Add grouping executables by regex

[pJunger]

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Is your feature request related to a problem? Please describe.
I have multiple related executables that share part of a name, but the names are not exactly the same. Additionally they contain useless prefixes & suffixes that are not needed in the label.
The binaries have a format like this: ${useless_prefix}_${common_name}_${some_differing_suffix}_${useless_suffix}
e.g. zzz_my_lib_unittest_0, zzz_my_lib_unittest_1 zzz_my_lib_componenttest_0.

Describe the solution you'd like
Something like groupByExecutableRegex where I could group/merge only by the common part that's relevant.

Describe alternatives you've considered
For my specific usecase those tests also share a common path segment for the source files, so a mergeByLabel option for groupBySource would work as well.

[matepek]

If your prefixes and suffixes had a fixed length then indexing would help too.
Like:

        "testGrouping": {
          "groupByExecutable": {
            "mergeByLabel": true,
            "label": "${baseFilename[3:6]}"
          }
        }

This selects part of the string like: "0123456789.exe" -> "3456"

Would this work for you?

[pJunger]

Unfortunately only the prefix is fixed size, everything else can vary.

[matepek]

I see.