Use new baseline indent rule in c-ts-mode

Use new baseline indent rule in c-ts-mode

Rework the indent rules in c-ts-mode using
c-ts-common-baseline-indent-rule.  Also reworked internal
functions for setting indent styles to make it simpler and (more
importantly) more readable.  Now there's a single function,
c-ts-mode--simple-indent-rules, that returns a value that can go
straight to treesit-simple-indent-rules.

* lisp/progmodes/c-ts-mode.el:
(c-ts-mode--indent-style-setter): Simplify.
(c-ts-mode--get-indent-style): Remove function.
(c-ts-mode--prompt-for-style): Use a hard-coded list of styles.
This is a tiny downgrade from the computed lists but is
acceptable.
(c-ts-mode-set-style): Use c-ts-mode--simple-indent-rules.
(c-ts-mode--standalone-grandparent): Docstring change.
(c-ts-mode--for-loop-indent-rule): New function.
(c-ts-mode--preproc-indent-rules): New variable.  Copied from
old indent rules and added some new rule.
(c-ts-mode--macro-heuristic-rules):
(c-ts-mode--simple-indent-rules):
(c-ts-mode--parenthesized-expression-indent-rule):
(c-ts-mode--label-indent-rules): New functions.
(c-ts-mode):
(c++-ts-mode): Use c-ts-mode--simple-indent-rules.

(cherry picked from commit 63d69bd154987bcc0434e0f85e09bf5dfa07b827)