* Suppressions: merged `isSuppressedLocal()` into `isSuppressed()`
* avoid some unnecessary copies when adding suppressions
* TestSuppressions: improved readability of multiple line string literals
* supressions.h: got rid of unnecessary copy and assignment operators for `Suppressions::Suppression` - fixes `performance-move-const-arg` clang-tidy warning
* TestSuppressions: cleaned up a variable construction
* moved more code into `HAVE_RULES`
* properly enable all internal and rules code in selfcheck
* updated TODOs in selfcheck
* testrunner.vcxproj.filters: updated
* added missing `Debug-PCRE` and `Release-PCRE` configurations for `testrunner` Visual Studio project
* cppcheck.cpp: fixed `useStlAlgorithm` selfcheck warning
* SingleExecutor: added TODOs
* test `SingleExecutor` with files and project
* SingleExecutor: process markup files after code when scanning project
* TestSingleExecutor: generate scoped files before calling executor
* CI-unixish.yml: added `--output-on-failure` to CTest call
* helpers.cpp: improved error reporting in `~ScopedFile()`
* use unique filenames in executor tests to avoid collisions
* fixed `functionStatic` selfcheck warnings
* removed old timing tracking code
* tools/triage_py/README.md: updated
* triage_version.py: fixed output when when stderr and stdout are not empty
* triage_version.py: added `--perf` to collect performance data in CSV format
* triage_version.py: added TODO about providing additional options
* triage_version.py: added `--start` to specify the first tag/commit to execute
* fixed some CLion "Unused global declaration" warnings
* fixed some CLion "Not implemented function" warnings
* fixed some CLion "Unused struct" warnings
* added TODO
* removed unused parameter reported by CLion
* fixed some CLion "Unused macro" warnings
* fixed some CLion "Condition is always true" warnings and a CLion "The value is never used" warning
* donate-cpu-server.py: bumped version
* donate-cpu-server.py: fixed some PyCharm inspection warnings
* donate-cpu-server.py: use `os.path.join()`
* donate-cpu-server.py: added support for basic `information` reports
* added asserts to make sure executors are only used in the intended context
* TestSuppressions: specify proper job counts in `checkSuppression*()`
* TestSuppressions: enabled all asserts in `runChecks()`
* TestSuppressions: removed unnecessary setting from `checkSuppression()`
* TestSuppressions: small cleanup in the way tests are called
* TestSuppressions: use `SingleExecutor`
