Update JWT auth page

[rjcrutch]

JWT is not applicable/available to Grafana Cloud. Only on-premise.

Please check that:

• It works as expected from a user's perspective.
• If this is a pre-GA feature, it is behind a feature toggle.
• The docs are updated, and if this is a notable improvement, it's added to our What's New doc.

[JStickler]

[docs team]

[jdbaldry]

Present in https://grafana.com/docs/grafana/v9.4/setup-grafana/configure-security/configure-authentication/jwt/ but not in https://grafana.com/docs/grafana/v9.3/setup-grafana/configure-security/configure-authentication/jwt/

[grafana-delivery-bot]

This PR must be merged before a backport PR will be created.

[grafana-delivery-bot]

This PR must be merged before a backport PR will be created.

[grafana-delivery-bot]

This PR must be merged before a backport PR will be created.

[grafana-delivery-bot]

This PR must be merged before a backport PR will be created.

[grafana-delivery-bot]

This PR must be merged before a backport PR will be created.

[grafana-delivery-bot]

This PR must be merged before a backport PR will be created.

[grafana-delivery-bot]

This PR must be merged before a backport PR will be created.

[grafana-delivery-bot]

This PR must be merged before a backport PR will be created.

[ephemeral-instances-bot]

Error building instance: Contact #proj-ephemeral-hg-instances if it is not a compile error. Logs

Error message

handling pull request closed event: deleting instance by slug: unexpected response status: status=502 responseBody=

<title>502 Server Error</title>

Error: Server Error

The server encountered a temporary error and could not complete your request.

Please try again in 30 seconds.

[grafana-delivery-bot]

The backport to v9.4.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new branch
git switch --create backport-87523-to-v9.4.x origin/v9.4.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x c912cb399bf87cb335b9f9cbaef92fc8f92bc795

When the conflicts are resolved, stage and commit the changes:

git add . && git cherry-pick --continue

If you have the GitHub CLI installed:

# Push the branch to GitHub:
git push --set-upstream origin backport-87523-to-v9.4.x
# Create the PR body template
PR_BODY=$(gh pr view 87523 --json body --template 'Backport c912cb399bf87cb335b9f9cbaef92fc8f92bc795 from #87523{{ "\n\n---\n\n" }}{{ index . "body" }}')
# Create the PR on GitHub
echo "${PR_BODY}" | gh pr create --title "[v9.4.x] Update JWT auth page" --body-file - --label "type/docs" --label "no-changelog" --label "backport" --base v9.4.x --milestone 9.4.x --web

Or, if you don't have the GitHub CLI installed (we recommend you install it!):

# Push the branch to GitHub:
git push --set-upstream origin backport-87523-to-v9.4.x

# Create a pull request where the `base` branch is `v9.4.x` and the `compare`/`head` branch is `backport-87523-to-v9.4.x`.

# Remove the local backport branch
git switch main
git branch -D backport-87523-to-v9.4.x

[grafana-delivery-bot]

The backport to v9.5.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new branch
git switch --create backport-87523-to-v9.5.x origin/v9.5.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x c912cb399bf87cb335b9f9cbaef92fc8f92bc795

When the conflicts are resolved, stage and commit the changes:

git add . && git cherry-pick --continue

If you have the GitHub CLI installed:

# Push the branch to GitHub:
git push --set-upstream origin backport-87523-to-v9.5.x
# Create the PR body template
PR_BODY=$(gh pr view 87523 --json body --template 'Backport c912cb399bf87cb335b9f9cbaef92fc8f92bc795 from #87523{{ "\n\n---\n\n" }}{{ index . "body" }}')
# Create the PR on GitHub
echo "${PR_BODY}" | gh pr create --title "[v9.5.x] Update JWT auth page" --body-file - --label "type/docs" --label "no-changelog" --label "backport" --base v9.5.x --milestone 9.5.x --web

Or, if you don't have the GitHub CLI installed (we recommend you install it!):

# Push the branch to GitHub:
git push --set-upstream origin backport-87523-to-v9.5.x

# Create a pull request where the `base` branch is `v9.5.x` and the `compare`/`head` branch is `backport-87523-to-v9.5.x`.

# Remove the local backport branch
git switch main
git branch -D backport-87523-to-v9.5.x