Deprecate and remove older MR widget telemetry events

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As a follow-up to this discussion on the MR to remove these events from our new reporting code infrastructure, this begins the remove a metric process to deprecate and remove:

• i_testing_code_quality_widget_total
• i_testing_terraform_widget_total
• i_testing_issues_widget_total
• i_testing_summary_widget_total
• i_testing_metrics_report_widget_total
• i_testing_web_performance_widget_total
• i_testing_license_compliance_widget_total
• i_testing_load_performance_widget_total
• i_testing_status_checks_widget