v0.0-569-gc836a56: Align module instance named parameters.

Eliminate the old format_module_instantiations flag, now that we have
fine-grain control over named parameter and named port connection sections of
module instances.

Slightly simplify the implementation of aligning named port connections.

Handle comments inside named parameter actuals lists.
(Fixes token partitioning w.r.t. comments, which also fixes formatter-caused
output corruption, due to line munging.)

PiperOrigin-RevId: 330578315