Backport of Implement user lockout log into release/1.14.x

[hc-github-team-secure-vault-core]

Backport

This PR is auto-generated from #23140 to be assessed for backporting due to the inclusion of the label backport/1.14.x.

🚨

Warning automatic cherry-pick of commits failed. If the first commit failed,
you will see a blank no-op commit below. If at least one commit succeeded, you
will see the cherry-picked commits up to, not including, the commit where
the merge conflict occurred.

The person who merged in the original PR is:
@davidadeleon
This person should manually cherry-pick the original PR into a new backport PR,
and close this one when the manual backport PR is merged in.

merge conflict error: POST https://api.github.com/repos/hashicorp/vault/merges: 409 Merge conflict []

The below text is copied from the body of the original PR.

---

This PR adds a log which will be emitted at a configurable interval (default of 1 minute), in the event of there being a locked user anywhere in Vault. This adds visibility for operators around the user lockout feature via the operational logs, allowing them to know when a user lockout is in effect. A WARN log will be emitted when a lockout is in effect, and an INFO log will be emitted when all lockouts have been cleared. The log interval can be modified as part of the server config using the user_lockout_log_interval parameter.

Example Config:
user_lockout_log_interval="30s"

---

Overview of commits

• 92fcfda

[hashicorp-cla]

Thank you for your submission! We require that all contributors sign our Contributor License Agreement ("CLA") before we can accept the contribution. Read and sign the agreement

Learn more about why HashiCorp requires a CLA and what the CLA includes

---

temp seems not to be a GitHub user.
You need a GitHub account to be able to sign the CLA. If you already have a GitHub account, please add the email address used for this commit to your account.

_{Have you signed the CLA already but the status is still pending? Recheck it.}

[github-actions]

CI Results:
Failures:

Test Type	Package	Test	Logs
	builtin/logical/database	TestBackend_StaticRole_LockRegression	view test results

[davidadeleon]

Backported here: #23630