Improve `adding-foreign-key-constraint` & `adding-not-null-field`

Added

• linter: warn about foreign key constraints in create table defs (#945)
• parser: support on conflict do select & sync regression suite (#935)
• parser: improve create function table return type parsing (#944)
• ide: find ref support for builtins (#942)
• ide: support inherits/like tables in inlay hints (#936)
• ide: add quick fixes for leading from (#933)
• ide: goto def for builtins (#932)

Fixed

• linter: fix adding-not-nullable-field for pg >= 12 with validated CHECK (#910). Thanks @reteps!

Changed

• linter: don't report lint errors when syntax error found (#943)