Backport of Audit: remove any race to read headers into release/1.16.x #26157
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Backport
This PR is auto-generated from #26155 to be assessed for backporting due to the inclusion of the label backport/1.16.x.
The below text is copied from the body of the original PR.
This PR adjusts the way in which audited header settings are accessed for read operations (single header, all headers), in order to prevent any data race when the underlying headers are invalidated and updated.
Reads are called from
vault/logical_system.go
(see PR diffhandleAuditedHeaderRead
andhandleAuditedHeadersRead
).Overview of commits