(treesit_predicate_match): Match node text against regexp without consing

(treesit_predicate_match): Match node text against regexp without consing

* src/treesit.c (treesit_predicate_match): Match node text against
regexp without creating a new string object (bug#60953).

* src/search.c (search_buffer): Make not static.
Delete declaration near the beginning of the file.

* src/lisp.h: Declare it here.

* lisp/progmodes/ruby-ts-mode.el (ruby-ts--builtin-method-p):
Remove function.
(ruby-ts--font-lock-settings): Use the regexp with :match directly.