Add tests for functions missing coverage

[gudmdharalds]

Add unit or integration tests for these functions as they are missing coverage currently:

• vipgoci_autoapproval_do_approve()
• vipgoci_auto_approval_non_approval()
• vipgoci_auto_approval_scan_commit(), Renaming various functions, dedicated file for results #102
• vipgoci_cached_indication_str(), Adding a few unit-tests, replacing assertEquals() with assertSame() #167
• vipgoci_github_approve_pr()
• vipgoci_github_authenticated_user_get(), Adding a few unit-tests, replacing assertEquals() with assertSame() #167
• vipgoci_github_pr_comments_cleanup()
• vipgoci_github_pr_comments_generic_submit()
• vipgoci_github_pr_generic_comment_delete()
• vipgoci_github_pr_generic_comments_get_all()
• vipgoci_github_pr_review_dismiss()
• vipgoci_github_pr_reviews_comments_delete()
• vipgoci_github_pr_reviews_dismiss_with_non_active_comments()
• vipgoci_report_submit_pr_review_from_results()
• vipgoci_http_api_fetch_url() -- better testing is needed.
• vipgoci_http_api_post_url()
• vipgoci_http_api_put_url()
• vipgoci_github_rate_limit_usage(), Adding a few unit-tests, replacing assertEquals() with assertSame() #167
• vipgoci_option_skip_folder_handle(), Adding a few unit-tests, replacing assertEquals() with assertSame() #167
• vipgoci_phpcs_scan_output_dump()
• vipgoci_results_filter_comments_to_max(), Adding a few unit-tests, replacing assertEquals() with assertSame() #167
• vipgoci_results_remove_existing_github_comments()
• vipgoci_report_submit_pr_generic_comment_from_results()
• vipgoci_report_maybe_no_issues_found()

Also, consider the following:

• Adding a test for vipgoci_sysxit(), but with exit() disabled. See Add vipgoci_sysexit() unit test #200.
• Adding a test for the $bypass_cache parameter to vipgoci_github_prs_implicated(). See Special exit status when no implicated PR was found, retry fetching PRs #199.