Alerting: Support passing tags to Pagerduty and allow notification on specific event categories (#21335)

Add support for passing tags to Pagerduty and allow notification 
on specific event categories such as Class, Group and Component.

Ref #19912, #19913

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>

In 043bb595 a URLSearchParams usage was introduced which is not supported by PhantomJS. @babel/polyfill(deprecated) does not contain polyfill for URLSearchParams, hence the code (and Prometheus graphs rendering) was failing in PhantomJS environment.

The solution is to add https://www.npmjs.com/package/url-search-params-polyfill that takes care of the URLSearchParams

* backendSrv: Only stringifies request body if payload isn't already a string

* Add test cases to verify behaviour

* Transpile selected es6 node deps

* Add es-check to build-fast-frontend

* change es-check is used

* transpile react-hook-form

- Moves filter titles to icons rather than table cell
- Increases colspan of ad-hoc stats cell instead of
rendering empty cells for parsed fields

* Fix PostgreSQL failure to create organisation for first time

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>

* Create basic react page for AdminUserCreate

* Forms.Field - render asterisk when field is marked as required

* Add validation to user create form wih react-hook-form

* Remove Angular code for UserCreatePage

* Remove commented route for admin settings

* Remove unused import

* Hide react-hooks-form behind Form component

* Fix webkit autofill

* Webkit autofill on inpiuts - bring back focus shadow

* Temporarily fix story (before 21635 is merged)

* Form: docs and minor updates to new form elements (#21635)

* Allow Switch, checkbox to be uncontrolled, forward refs, styles update

* Add Form docs

* User create page update

* Remove unused import

* Apply review notes

* Docs: Whats new updates

* Add cloudwatch and stackdriver paragraphs

* Minor changes

* Add link helper to render gif

* Docs: what's new updates

Co-authored-by: Erik Sundell <erik.sundell87@gmail.com>

* Snap to next higher period instead of closest

* Adjust period calc

* Chore: Fixes PhantomJs rendering

* Docs: Updated docs

* Update contribute/style-guides/e2e.md

Co-Authored-By: Dominik Prokop <dominik.prokop@grafana.com>

* Docs: Updates docs according to PR comments

Co-authored-by: Dominik Prokop <dominik.prokop@grafana.com>

Minor format fix

Closes #10494

* next version 6.7.0

* updates grafana/toolkit and co

* Verison: manually fixed version

* Docs: Updated what's new articel

* fixed spelling

* Updated

Fixes #21086

* Changelod: v6.6.0-beta1

* Changelog: grafana/ui v6.6.0-beta.1.0

* Changelog: moved toolkit to its own file

* Changelog: fix version

* Remove closed PR

Co-authored-by: Sofia Papagiannaki <papagian@users.noreply.github.com>

* Chore: Remove angular dependency from backendSrv

* Refactor: Naive soultion for logging out unauthorized users

* Refactor: Restructures to different streams

* Refactor: Restructures datasourceRequest

* Refactor: Flipped back if statement

* Refactor: Extracted getFromFetchStream

* Refactor: Extracts toFailureStream operation

* Refactor: Fixes issue when options.params contains arrays

* Refactor: Fixes broken test (but we need a lot more)

* Refactor: Adds explaining comments

* Refactor: Adds latest RxJs version so cancellations work

* Refactor: Cleans up the takeUntil code

* Refactor: Adds tests for request function

* Refactor: Separates into smaller functions

* Refactor: Adds last error tests

* Started to changed so we require getBackendSrv from the @grafana-runtime when applicable.

* Using the getBackendSrv from @grafana/runtime.

* Changed so we use the getBackendSrv from the @grafana-runtime when possible.

* Fixed so Server Admin -> Orgs works again.

* Removed unused dependency.

* Fixed digest issues on the Server Admin -> Users page.

* Fix: Fixes digest problems in Playlists

* Fix: Fixes digest issues in VersionHistory

* Tests: Fixes broken tests

* Fix: Fixes digest issues in Alerting => Notification channels

* Fixed digest issues on the Intive page.

* Fixed so we run digest after password reset email sent.

* Fixed digest issue when trying to sign up account.

* Fixed so the Server Admin -> Edit Org works with backendSrv

* Fixed so Server Admin -> Users works with backend srv.

* Fixed digest issues in Server Admin -> Orgs

* Fix: Fixes digest issues in DashList plugin

* Fixed digest issues on Server Admin -> users.

* Fix: Fixes digest issues with Snapshots

* Fixed digest issue when deleting a user.

* Fix: Fixes digest issues with dashLink

* Chore: Changes RxJs version to 6.5.4 which includes the same cancellation fix

* Fix: Fixes digest issue when toggling folder in manage dashboards

* Fix: Fixes bug in executeInOrder

* Fix: Fixes digest issue with CreateFolderCtrl and FolderDashboardsCtrl

* Fix: Fixes tslint error in test

* Refactor: Changes default behaviour for emitted messages as before migration

* Fix: Fixes various digest issues when saving, starring or deleting dashboards

* Fix: Fixes digest issues with FolderPickerCtrl

* Fixed digest issue.

* Fixed digest issues.

* Fixed issues with angular digest.

* Removed the this.digest pattern.

Co-authored-by: Hugo Häggmark <hugo.haggmark@gmail.com>
Co-authored-by: Marcus Andersson <systemvetaren@gmail.com>

* Update version and snapshots

Co-authored-by: Dominik Prokop <dominik.prokop@grafana.com>

* Make sure dimension value is being returned, and not just label

* Fix typo

Test dashboard for using influxdb with logs panel

* test data refactor

* new random walk options

* fixed test

* Added automatic names

opening the Graphite query editor and there is no data
for the last segment value.

Fixes #21563

* CI: ee msi build

* shellcheck

* Fake it so that we get a ee msi build on pull request runs

* fix error in prep job

* save msi for testing

* get enterprise zip

* Fixes to version and hash detection.

* Removes ci test code