byacc: Update to 20230201.

Note that this enables the backtracking extension, which we had previously left disabled.

PR: 244149, 269425
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D38421

Import byacc from invisible island, it brings us lots of compatibilities with
bison, keeping full compatibility with our previous yacc implementation.

Also bring the ability to create reentrant parser

This fix bin/140309 [1]

PR: bin/140309 [1]
Submitted by: Philippe Pepiot <ksh@philpep.org> [1]
Approved by: des (mentor)
MFC after: 1 month