feat: support PostgreSQL 18 RETURNING OLD/NEW

[dengliming]

Fixes #2327

[manticore-projects]

Looks good, I will merge when tests pass.
Please pay attention to the Grammar, there are now lots of warning about ambiguity and missing LOOKAHEADs.

[dengliming]

@manticore-projects Thanks. I'll check later.

[manticore-projects]

@manticore-projects Thanks. I'll check later.

Reading from file /home/are/Documents/src/JSQLFormatter/JSQLParser/target/javacc-1772732167326/node/JSqlParserCC.jj . . .
Note: UNICODE_INPUT option is specified. Please make sure you create the parser/lexer using a Reader with the correct character encoding.
Warning: Choice conflict in [...] construct at line 2636, column 5.
         Expansion nested within construct and expansion following construct
         have common prefixes, one of which is: "WITH"
         Consider using a lookahead of 2 or more for nested expansion.
Warning: Choice conflict in [...] construct at line 7390, column 17.
         Expansion nested within construct and expansion following construct
         have common prefixes, one of which is: "ENCODING"
         Consider using a lookahead of 2 or more for nested expansion.
Warning: Choice conflict in [...] construct at line 7397, column 21.
         Expansion nested within construct and expansion following construct
         have common prefixes, one of which is: "ENCODING"
         Consider using a lookahead of 2 or more for nested expansion.
Warning: Choice conflict in (...)* construct at line 7676, column 9.
         Expansion nested within construct and expansion following construct
         have common prefixes, one of which is: ","
         Consider using a lookahead of 2 or more for nested expansion.
Warning: Choice conflict in [...] construct at line 8806, column 9.
         Expansion nested within construct and expansion following construct
         have common prefixes, one of which is: "PATH"
         Consider using a lookahead of 2 or more for nested expansion.
Warning: Choice conflict involving two expansions at
         line 8895, column 9 and line 8900, column 9 respectively.
         A common prefix is: <DATA_TYPE>
         Consider using a lookahead of 2 for earlier expansion.
Warning: Choice conflict in [...] construct at line 9834, column 5.
         Expansion nested within construct and expansion following construct
         have common prefixes, one of which is: "DESC"
         Consider using a lookahead of 2 or more for nested expansion.
Warning: Choice conflict in [...] construct at line 10297, column 21.
         Expansion nested within construct and expansion following construct
         have common prefixes, one of which is: "INDEX"
         Consider using a lookahead of 2 or more for nested expansion.
Warning: Choice conflict in [...] construct at line 10443, column 25.
         Expansion nested within construct and expansion following construct
         have common prefixes, one of which is: "INDEX"
         Consider using a lookahead of 2 or more for nested expansion.
Warning: Choice conflict in [...] construct at line 10537, column 37.
         Expansion nested within construct and expansion following construct
         have common prefixes, one of which is: "INDEX"
         Consider using a lookahead of 2 or more for nested expansion.
Warning: Choice conflict in [...] construct at line 10573, column 39.
         Expansion nested within construct and expansion following construct
         have common prefixes, one of which is: "INDEX"
         Consider using a lookahead of 2 or more for nested expansion.