git_machete.cli.launch inconsistently checks options in both parsed_cli and cli_opts

[PawelLipski]

We've got sometimes:

                machete_client.checkout_github_prs(pr_numbers=parsed_cli.pr_no if 'pr_no' in parsed_cli else [],
                                                   all=parsed_cli.all if 'all' in parsed_cli else False,
                                                   mine=parsed_cli.mine if 'mine' in parsed_cli else False,
                                                   by=parsed_cli.by if 'by' in parsed_cli else None,
                                                   fail_on_missing_current_user_for_my_opened_prs=True)

but most of the time:

                machete_client.create_github_pr(
                    head=current_branch,
                    opt_draft=cli_opts.opt_draft,
                    opt_onto=cli_opts.opt_onto)

Advantage of cli_opts: type-safe access

Advantage of parsed_cli: one layer less to pass data around

TBD what to do