APIkeys: Add metrics for apikey endpoints

[eleijonmarck]

What is this feature?

added metrics:

grafana_api_api_keys_create_total 3
grafana_api_api_keys_delete_total 1
grafana_api_api_keys_get_total 7

Why do we need this feature?
This is needed for monitoring of the use of API keys for users as part of the deprecation strategy

OG issue: #53567

[grafanabot]

Hello @eleijonmarck!
Backport pull requests need to be either:

• Pull requests which address bugs,
• Urgent fixes which need product approval, in order to get merged,
• Docs changes.

Please, if the current pull request addresses a bug fix, label it with the type/bug label.
If it already has the product approval, please add the product-approved label. For docs changes, please add the type/docs label.
If the pull request modifies CI behaviour, please add the type/ci label.
If none of the above applies, please consider removing the backport label and target the next major/minor release.
Thanks!

[danielkenlee]

Hi @eleijonmarck - backporting to 9.4 should help us gather much needed metrics to help guide the deprecation of API keys. Approved from Product.

[Jguer]

Since we want these stats now and we're backporting I understand placing them in pkg/infra/metrics/metrics.go. In the future they should be declared by the appropriate service.

Hopefully these counters can be removed soon

[grafanabot]

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-66732-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 c505d26430e85baa20429675c8958d42ea67adf4
# Push it to GitHub
git push --set-upstream origin backport-66732-to-v9.4.x
git switch main
# Remove the local backport branch
git branch -D backport-66732-to-v9.4.x

Then, create a pull request where the base branch is v9.4.x and the compare/head branch is backport-66732-to-v9.4.x.

[grafanabot]

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-66732-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 c505d26430e85baa20429675c8958d42ea67adf4
# Push it to GitHub
git push --set-upstream origin backport-66732-to-v9.5.x
git switch main
# Remove the local backport branch
git branch -D backport-66732-to-v9.5.x

Then, create a pull request where the base branch is v9.5.x and the compare/head branch is backport-66732-to-v9.5.x.

[eleijonmarck]

this change should be reverted as we already have these metrics in place for grafana instances of OSS