Missing request ID in audit entries for help requests

**Describe the bug**
Audit entries for e.g. `vault path-help` don't have a `request.id` set.
This throws of code trying to match responses to requests

**To Reproduce**
Steps to reproduce the behavior:
1. Enable audit logging
2. Run `vault path-help sys/policies/acl`
3. Inspect created audit entry

**Expected behavior**
All logs should have that ID set

**Environment:**
* Vault Server Version (retrieve with `vault status`): Vault 1.20.0
* Vault CLI Version (retrieve with `vault version`): Vault v1.21.4

Start by enabling audit logging and running `vault path-help sys/policies/acl` against Vault 1.20.0 with the CLI version noted in the issue, then inspect the resulting audit entry and trace the help-request path into the Go audit code. Done means audit entries produced by help requests include a usable `request.id` so responses can be matched to requests.

Written by the indexing model from the issue text.