Describe the problem

In #89477, we're introducing MVCCGetWithValueHeader. Unfortunately, this is called from MVCCGet and the call there is not inlined, which could have a performance penalty since it's a hot code path. We should check and potentially optimize further.

To Reproduce

Add // gcassert:inline to MVCCValueHeader and run the lints (unfortunately can't run them locally)

Jira issue: CRDB-22190