This is one step closer to making the transition to .vue files for issue boards

This param is passed to service in two places, one is in the build_user for non ldap oauth users. And the other is in the initial production admin user seed data.

Without this change, when setting up GitLab in a production environment, you were not being given the option of setting the root password on initial setup in the UI.

Closes gitaly#168

The MergeRequestsFinder uses the milestone_title instead of the
milestone_id

Also improved code formatting

desired decimals for the cpu metrics

to help differentiate legends

Cleaned up some code

* Add text for the buttons on environment detail page
* Reduced the size of the charts
* Environment name is now a link

Also some general code cleanup

Implement module for setting "Poll-Interval" response header.
Return 429 in ETag caching middleware when polling is disabled.

1. Never send a pipeline email to anyone other than the user who created
   the pipeline.
2. Only send pipeline success emails to people with the custom
   notification setting for enabled. Watchers and participants will
   never receive this.
3. When custom settings are unset (for new settings and legacy ones),
   act as if failed_pipeline is set.

Closes #30209

See !10263

From Bullet failures in !10263