Should --ignore-project exclude other project-specific options?

Do we have any rules around precedence and validation of combinations of options (irrespective of command)?

I would expect that `--ignore-project` would have precedence over `--project-dir` and `--project-file` and that if I supplied `--ignore-project` with any other project-specific options then that would be an error.

Start by locating Cabal's command-line option parsing and validation for --ignore-project, --project-dir, and --project-file across commands. Review existing precedence and combination tests, then add coverage showing the intended behavior for conflicting project-specific options.

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