Fix ICE in rewrite_expr_tree_parallel

1. Limit the value of tree-reassoc-width to IntegerRange(0, 256).
2. Add width limit in rewrite_expr_tree_parallel.

gcc/ChangeLog:

	PR tree-optimization/110038
	* params.opt: Add a limit on tree-reassoc-width.
	* tree-ssa-reassoc.cc
	(rewrite_expr_tree_parallel): Add width limit.

gcc/testsuite/ChangeLog:

	PR tree-optimization/110038
	* gcc.dg/pr110038.c: New test.