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.

sbroad-core/src/frontend/sql/ir/tests.rs

@@ -3568,6 +3568,11 @@ fn front_mock_set_param_transaction() {
         r#"set local time zone local"#,
         r#"set time zone -3"#,
         r#"set time zone 'value'"#,
+        r#"SET search_path TO my_schema, public;"#,
+        r#"SET datestyle TO postgres, dmy;"#,
+        r#"SET TIME ZONE 'PST8PDT';"#,
+        r#"SET TIME ZONE 'Europe/Rome';"#,
+        r#"SET param To list, 'of', 4, valuez;"#,
         r#"set transaction snapshot 'snapshot-string'"#,
         r#"set transaction read write"#,
         r#"set transaction read only"#,