fix: support list param values in SET command

Summarize the changes

• fix: support list param values in SET command

Ensure that

• New code is covered by unit and integration tests.
• [ ] Related issues would be automatically closed with gitlab's closing pattern (Closes #1, #2).
• [ ] Public modules are documented (check the rendered version with cargo doc --open).
• (if PEST grammar is changed) EBNF grammar reflects these changes (check the result with railroad diagram generator.

Next steps

• Cherry-pick to:
• Update sbroad submodule in picodata/picodata.
• (if EBNF grammar is changed) create a follow-up issue in picodata/docs.

assigned to @UngiftedPoet

From postgres doc:

Values can be specified as string constants, identifiers, numbers, or comma-separated lists of these, as appropriate for the particular parameter.

Don't we need to add SET to EBNF grammar?

requested review from @senya_volynets

resolved all threads

approved this merge request

enabled an automatic merge when the pipeline for c508313e succeeds

merged