Match file name to type name when possible

[MikeAlhayek]

@jtkech there are more mismatch that I expected. I renamed the filenames to the type when possible. In some cases, I moved the types to their own file.

[jtkech]

Yes so many changes, that's why I haven't even tried it, waiting for having more time ;)

What I did in #14151 was more like fixing a "typo" in 3 file names than following the SA1649 rule.

Will be the same for example if we update namespace declarations, and so on.

Maybe we should not be too strict, I don't know, I've no closed opinion.

Maybe need to be discussed in a meeting to adopt the most reasonable compromises.

And for now just let things as they are (easiest compromise).

[MikeAlhayek]

Maybe we should not be too strict, I don't know, I've no closed opinion.

Yes that is why I did not enforce the rule. All the changes in this PR is just to match the file name to the type. We still have some types that do not match filename.

But I think what I included in this PR should be acceptable as it does not impact much except for making the file more consistence.

[jtkech]

Okay then, I will review it asap.

[jtkech]

Can't check every file but LGTM.

Good job!