Fixes #18383

Turns out, that behaviour was a bug we introduced as part of the LDAP
sync. It was squashed as part of #18298.

* GitLab OAuth: GetGroups refactor

* GitLab OAuth: fetch groups into UserInfo

* GitLab OAuth: minor refactor

* GitLab OAuth: team sync docs

* Fix: Avoid glob of single-value array variables

Based on our current implementation of templates, when multi-select
variables are part of a dashboard query the default/fallback formatting option is `glob`.

Some data sources do not support glob (e.g. metrics.{a}.* instead of
metrics.a.*) for single variable queries. This behaviour breaks dashboards.

This commit introduces an alternative formatting option where globing is avoided if it's there is only one value as part of the query variable.

This means, queries previously formatted as `query=metrics.{a}.*.*`, are
now formatted as `query=metrics.a.*.*`. However, queries formatted as
`query=metrics.{a,b}.*.*` continue to be as is.

In response to #18282

DataLinksEditor does not limit amount of links by default now (it was 1 link before, unless maxLinks prop was specified). Also, links that do not have label specified, are not rendered anymore.

* Fix: Fixes Legend overflow in Explore splitted view

* Chore: Removes overflow-x because of accessibility POV and uses pre-wrap instead

* ReactPanels: Fixed panel header tooltip rendering crash

* Added unit test

* Improved test

* Frontend:adds folder name in choose home dash menu(#18293)

* Frontend:adds folder name in choose home dash menu(#18293)

* TestData: added support for nested data source variable queries, and test dashboard

* Added drilldown dashboards

* Fixed typescript issue

Make empty string if there is no panel description

- Lower strictNullChecks: true errors

* Chore: Move DisplayValue to grafana/data

* Chore: Move GraphSeriesXY to grafana/data

* Fix: Fixes incorrect handling of utc in timeEpic

* Chore: Renames dateTimeFromTimeZone to dateTimeForTimeZone

Allow datasource connection to postgres with password "scram-sha-256" 
authentification.

Fixes #14662

Fixes #17665

This commit addresses half of #13749 by making sure GetMetricData 
works for alerting. Math Expressions (compound metrics) will still not 
work for alerting, this would require a bigger refactoring of Grafana's 
alerting service. However, with this commit at least alerting for basic 
metrics with non empty query Id will work.

Fixes half of #13749

* CI: Added metric to track strict null errros

* Update scripts/ci-frontend-metrics.sh

Co-Authored-By: Hugo Häggmark <hugo.haggmark@grafana.com>

* Auth: Do not search for the user twice

Previously `initContextWithBasicAuth` did not use `LoginUserQuery`, doing
`GetUserByLoginQuery` only i.e. looking user in DB only, things changed when
this function started to check LDAP provider via `LoginUserQuery` (#6940),
however, this request was placed after `GetUserByLoginQuery`, so we first
looking in DB then in the LDAP - if LDAP user hasn't logged in we will
not find it in DB, so `LoginUserQuery` will never be reached.

`LoginUserQuery` request already performs `GetUserByLoginQuery`
request in correct sequence. So we can just remove redundant request.

* Correct sequence execution during authentification &
  introduce tests for it

* Move basic auth tests to separate test file, since main test file already
  pretty large

* Introduce `testing.go` for the middleware module

* Remove redundant test helper function

* Make handler names more explicit

Ref 5777f65d
Fixes #18329

* Auth: address review comment

* added alert rule tags in webhook notifications

* fix: don't include whole list of Tag objects but only key/value pairs in Webhook JSON

* marked webhook alerts to support alert rule tags

* Changelog: v6.3.0-beta3

* Changelog: 6.3.0-beta4