feat: tier support in sql

Summarize the changes

Added optional "ON TIER("tier_name")" part to CREATE TABLE statement.

Added check that all tables in the query belong to a single tier. Using global tables in mix with sharded from single tier is ok. Multi tier queries is aborted.

Closes #677 (closed)

Ensure that

• New code is covered by unit and integration tests --- in Picodata picodata!1032 (merged).
• Related issues would be automatically closed with gitlab's closing pattern.
• 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

• Update sbroad submodule in picodata/picodata.
• (if EBNF grammar is changed) create a follow-up issue in picodata/docs --- docs#275 (closed)