fix: rename [on tier] clause of create table

Summarize the changes

Rename [on tier("tier_name")] clause of create table to [in tier "tier_name"]

Ensure that

• New code is covered by unit and integration tests. In picodata follow-up --- picodata!1152 (merged)
• Related to #703 (closed)
• 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: none
• Update sbroad submodule in picodata/picodata.
• (if EBNF grammar is changed) docs#306 (closed)