Mix include and exclude paths in workflows

[philderbeast]

On reflection and after reading about excluding paths, we know the paths that cabal-install is dependent on, why don't we switch from paths-ignore to paths?

$ cabal info cabal-install
...
    Dependencies:  ... Cabal ...
                   Cabal-syntax ...
                   cabal-install-solver ...
                   Cabal-QuickCheck ...
                   Cabal-described ... Cabal-tests ... cabal-install, ...

It is also possible to mix, to exclude and include paths.

Originally posted by @philderbeast in #10740 (comment)

That would give us a configuration something like:

    paths:
      - 'Cabal-QuickCheck/**'
      - 'Cabal-described/**'
      - 'Cabal-syntax/**'
      - 'Cabal-tests/**'
      - 'Cabal/**'
      - 'cabal-install-solver/**'
      - 'cabal-install/**'
      - '!Cabal-tests/test/**'
      - '!cabal-testsuite/PackageTests/**'