src: inline ProcessCliArgs in the Environment constructor

Inline `ProcessCliArgs()` in the `Environment` constructor, and
emit the `Environment` creation trace events with the arguments
earlier. Remove the unused arguments passed to `CreateProcessObject()`
since these are now attached to process in `PatchProcessObject()`
during pre-execution instead.

PR-URL: https://github.com/nodejs/node/pull/27539


Reviewed-By: Anna Henningsen <anna@addaleax.net>