proposal: provide runById

[userquin]

Right now when we filter by pattern, any test in any file (and any workspace) will run: for example, the list displayed in the CLI may be interpreted to run the selected test.

This proposal is about allow run tests or suites in the UI and from CLI, and so, we will need:

• expose runById in the core
• expose runById in the rpc
• add x to the CLI: will show a list of tests and suites matching a pattern: similar to t but for running the test or suite by id
• update UI to use runById (right now using pattern)

I will try to send a PR to include the runById logic to the core, later we can iterate adding the new stuff to the RPC, CLI and the UI.

We have this draft PR #6405 introducing an overhauled public API.

related #6641 #6649