Normalize cstrs for cache hint effectiveness and test stability

Normalize cstrs for cache hint effectiveness and test stability

	* lisp/emacs-lisp/comp-cstr.el (comp-normalize-valset)
	(comp-union-valsets, comp-intersection-valsets)
	(comp-normalize-typeset): New functions.
	(comp-union-typesets, comp-intersect-typesets)
	(comp-cstr-union-homogeneous-no-range, comp-cstr-union-1-no-mem):
	Update to return normalized results.
	* test/lisp/emacs-lisp/comp-cstr-tests.el
	(comp-cstr-typespec-tests-alist): Normalize expected type specifiers.