fixed #14330/#14268 - updated simplecpp to 1.6.4 / adjusted file lookups from `simplecpp::Location`

[firewave]

[firewave]

This contains the changes required after https://github.com/danmar/simplecpp/pull/573 has landed.

I still need to adjust the simplecpp::Output exception handling in CppCheck::checkInternal() which I will post as a separate PR.

[firewave]

Should merge #8036 first.

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[danmar]

@firewave I released simplecpp-1.6.4 click on the "Ready for review" when you feel this is ready.

[firewave]

Ready.