Regex config util

[sconwayaus]

To support #2074 raised by @IEncinas10 (Adding regex to name styling rules), this PR adds a function to return a ConfigValueSetter for a regex. The function checks the validity of the regex before returning with a status response.

[hzeller]

Can you check the output of the clang-tidy ?

Unfortunately, the github UI for some reason does not allow to unfold parts of the logs, so we need to look at the raw-log:

https://pipelinesghubeus23.actions.githubusercontent.com/Vjp6wX1uV2r1O1Bj6h2lKqrBcOftZCnAHGZLuirThVBBZtBnxy/_apis/pipelines/1/runs/5667/signedlogcontent/2?urlExpires=2024-06-13T15%3A14%3A55.5066083Z&urlSigningMethod=HMACV1&urlSignature=YElrIfSHMhUjzc2eoSGHbSqqh7ZGMx3U36SdQU3XmhY%3D

Looks like it found an opportunity to make a

 if (foo) {
    return bar;
} else {
   return baz;
}

to

if (foo) {
   return bar;
}
reteurn baz;

(also some missing or superfluous includes)

[hzeller]

LGTM.
Ready to merge after clang-tidy is happy.

[sconwayaus]

Should be good now. Thanks