fix: used to panic on different values rows len

Summarize the changes

• fix: used to panic on different values rows len

• When creating Values node in IR we didn't check that all values rows have the same length.
• This led to panic on earlier pipeline stages: syntax plan build
• Add a check that all values rows have the same length

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.

close #759 (closed)

Next steps

• Cherry-pick to: none
• Update sbroad submodule in picodata/picodata.
• (if EBNF grammar is changed) create a follow-up issue in picodata/docs.