Fix test selection in adapter/vitest

[flunderpero]

• Always add the filename in build_file_run_args and build_line_run_args to prevent running too many tests that match in other files.
• Fix --testNamePattern for parameterised tests and describes (test.each, describe.each)
• Fix construction of --testNamePattern to properly match describe with or without nested test names. Make the match as narrow as possible to prevent selecting too many tests.

I would have loved to add unit tests for the test selection logic but I saw that there is no infrastructure for it yet and I am not savvy enough with nvim/lua to add the infrastructure.

[quolpr]

@flunderpero thanks for all you work, very appreciate it 🙏 Will review & merge this week. Same for playwright adapter