[functionalplus] Remove fplus, add functionalplus to instead of fplus.

[LilyWangLL]

Closes #38213.

• Changes comply with the maintainer guide.
• SHA512s are updated for each updated download.
• The "supports" clause reflects platforms that may be fixed by this new version.
• Any fixed CI baseline entries are removed from that file.
• Any patches that are no longer applied are deleted from the port's directory.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Only one version is added to each modified port's versions file.

[dg0yt]

Please fix commit and PR title: It is spelled fplus.

[JavierMatosD]

Please add a description to the new functionalPlus port mentioning that this is the new fplus port. That way if a user vcpkg search fplus then they will get the functionalPlus port.

Also, modify the frugallyDeep port to add the new functionalPlus port as a dependency.

Finally, remove fplus from the baseline and delete the port directory. Please leave the version files.

Thanks for the update! :)