Docs: Fix list of sample providers (#26067)

* Fix list of sample providers

The sample providers on this page has changed, so the list at the top of the page is no longer correct. Also link to Octo and Azure AD pages from here, since they are also OAuth2 providers.

* Fix misspelled Okta

* Make bullet list of OAuth2 providers

* Sort list of OAuth2 providers alphabetically

docs/sources/auth/generic-oauth.md

@@ -12,8 +12,13 @@ weight = 3
 
 # Generic OAuth Authentication
 
-You can configure many different OAuth2 authentication services with Grafana using the generic OAuth2 feature. Below you
-can find examples using Okta, BitBucket, OneLogin and Azure.
+You can configure many different OAuth2 authentication services with Grafana using the generic OAuth2 feature. Examples:
+- [Auth0](#set-up-oauth2-with-auth0)
+- [Azure AD]({{< relref "azuread.md" >}})
+- [BitBucket](#set-up-oauth2-with-bitbucket) 
+- [Centrify](#set-up-oauth2-with-centrify)
+- [Okta]({{< relref "okta.md" >}}) 
+- [OneLogin](#set-up-oauth2-with-onelogin)
 
 This callback URL must match the full HTTP address that you use in your browser to access Grafana, but with the prefix path of `/login/generic_oauth`.
 
@@ -54,58 +59,6 @@ Check for the presence of a role using the [JMESPath](http://jmespath.org/exampl
 
 See [JMESPath examples](#jmespath-examples) for more information.
 
-## Set up OAuth2 with Bitbucket
-
-```bash
-[auth.generic_oauth]
-name = BitBucket
-enabled = true
-allow_sign_up = true
-client_id = <client id>
-client_secret = <client secret>
-scopes = account email
-auth_url = https://bitbucket.org/site/oauth2/authorize
-token_url = https://bitbucket.org/site/oauth2/access_token
-api_url = https://api.bitbucket.org/2.0/user
-team_ids =
-allowed_organizations =
-```
-
-## Set up OAuth2 with OneLogin
-
-1.  Create a new Custom Connector with the following settings:
-    - Name: Grafana
-    - Sign On Method: OpenID Connect
-    - Redirect URI: `https://<grafana domain>/login/generic_oauth`
-    - Signing Algorithm: RS256
-    - Login URL: `https://<grafana domain>/login/generic_oauth`
-
-    then:
-2.  Add an App to the Grafana Connector:
-    - Display Name: Grafana
-
-    then:
-3.  Under the SSO tab on the Grafana App details page you'll find the Client ID and Client Secret.
-
-    Your OneLogin Domain will match the URL you use to access OneLogin.
-
-    Configure Grafana as follows:
-
-    ```bash
-    [auth.generic_oauth]
-    name = OneLogin
-    enabled = true
-    allow_sign_up = true
-    client_id = <client id>
-    client_secret = <client secret>
-    scopes = openid email name
-    auth_url = https://<onelogin domain>.onelogin.com/oidc/2/auth
-    token_url = https://<onelogin domain>.onelogin.com/oidc/2/token
-    api_url = https://<onelogin domain>.onelogin.com/oidc/2/me
-    team_ids =
-    allowed_organizations =
-    ```
-
 ## Set up OAuth2 with Auth0
 
 1.  Create a new Client in Auth0
@@ -132,6 +85,23 @@ allowed_organizations =
     api_url = https://<domain>/userinfo
     ```
 
+## Set up OAuth2 with Bitbucket
+
+```bash
+[auth.generic_oauth]
+name = BitBucket
+enabled = true
+allow_sign_up = true
+client_id = <client id>
+client_secret = <client secret>
+scopes = account email
+auth_url = https://bitbucket.org/site/oauth2/authorize
+token_url = https://bitbucket.org/site/oauth2/access_token
+api_url = https://api.bitbucket.org/2.0/user
+team_ids =
+allowed_organizations =
+```
+
 ## Set up OAuth2 with Centrify
 
 1.  Create a new Custom OpenID Connect application configuration in the Centrify dashboard.
@@ -163,6 +133,41 @@ allowed_organizations =
     api_url = https://<your domain>.my.centrify.com/OAuth2/UserInfo/<Application ID>
     ```
 
+## Set up OAuth2 with OneLogin
+
+1.  Create a new Custom Connector with the following settings:
+    - Name: Grafana
+    - Sign On Method: OpenID Connect
+    - Redirect URI: `https://<grafana domain>/login/generic_oauth`
+    - Signing Algorithm: RS256
+    - Login URL: `https://<grafana domain>/login/generic_oauth`
+
+    then:
+2.  Add an App to the Grafana Connector:
+    - Display Name: Grafana
+
+    then:
+3.  Under the SSO tab on the Grafana App details page you'll find the Client ID and Client Secret.
+
+    Your OneLogin Domain will match the URL you use to access OneLogin.
+
+    Configure Grafana as follows:
+
+    ```bash
+    [auth.generic_oauth]
+    name = OneLogin
+    enabled = true
+    allow_sign_up = true
+    client_id = <client id>
+    client_secret = <client secret>
+    scopes = openid email name
+    auth_url = https://<onelogin domain>.onelogin.com/oidc/2/auth
+    token_url = https://<onelogin domain>.onelogin.com/oidc/2/token
+    api_url = https://<onelogin domain>.onelogin.com/oidc/2/me
+    team_ids =
+    allowed_organizations =
+    ```
+
 ## JMESPath examples
 
 To ease configuration of a proper JMESPath expression, you can test/evaluate expressions with custom payloads at http://jmespath.org/.