Remove GMAU performance_indicator_type from several metric definitions

What does this MR do and why?

Describe in detail what your merge request does and why.

This MR fixes removes gmau and paid_gmau as the performance_indicator_types in the counts.static_site_editor_views, usage_activity_by_stage_monthly.create.action_monthly_active_users_design_management, usage_activity_by_stage_monthly.secure.user_secret_detection_jobs, usage_activity_by_stage_monthly.secure.user_license_management_jobs metric definition files.

• counts.static_site_editor_views: The metric has been removed (status: removed) and it is an all-time counter, so it never should have had those flags in the first place. This will help clean up our data models and prevent create:editor from having multiple metrics designed for GMAU and paid GMAU.
• usage_activity_by_stage_monthly.create.action_monthly_active_users_design_management: plan:product planning had 2 metrics flagged for paid GMAU. It was agreed in this issue to remove the paid GMAU flag from this metric
• usage_activity_by_stage_monthly.secure.user_secret_detection_jobs: secure:static analysis had 2 metrics flagged for GMAU and paid GMAU. It was agreed in this issue to remove the GMAU and paid GMAU flags from this metric
• usage_activity_by_stage_monthly.secure.user_license_management_jobs: secure:composition analysis had 2 metrics flagged for GMAU and paid GMAU. It was agreed in this issue to remove the GMAU and paid GMAU flags from this metric

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