Fix IndexStatus find_or_create race condition

See merge request gitlab-org/gitlab!36266

**TL;DR** Fix a race condition where `IndexStatus` is not created and
does not raise error. Need to use `!` and get rid of problematic unique
model validation.

Looking at the code I notice a logical problem with using
`find_or_create_by` alongside a unique model validation. The problem is
a race condition which comes from `find_or_create` first checking to see
if the record exists. If it does not it tries creating which then
invokes the validation which checks again to see if the record exists
which finally returns a validation error. But see here we are not using
`!` version of `find_or_create` and so this validation error is silently
ignored.

Since we already have a
[`safe_find_or_create_by!`](
https://gitlab.com/gitlab-org/gitlab/-/blob/2b01f1f3420d9177e27418df063aad2e1bda1216/app/models/application_record.rb#L37
)
which is designed for handling this race condition using unique indexes
and rescue and seeing that this model already has the [unique
index](
https://gitlab.com/gitlab-org/gitlab/-/blob/2b01f1f3420d9177e27418df063aad2e1bda1216/db/structure.sql#L19266
)
we should just get rid of the model validation since it just complicates
the error handling.

Since this is a pretty weird race condition it seems tricky/contrived to
try to create a proper unit test for this case.

Move tracing page

See merge request gitlab-org/gitlab!36511

As part of the reorganization, move the tracing file to the new
home for Operations files.

Move the Create Dashboards and dashboard YAML pages

See merge request gitlab-org/gitlab!36504

Create the bare stub for the dashboards page.

Support markdown in user's bio attribute

See merge request gitlab-org/gitlab!35604

Track wiki page views in Snowplow

See merge request gitlab-org/gitlab!35784

Add additional sort values for Jira issue finder

See merge request gitlab-org/gitlab!36364

Convert serialized date times into UTC

Closes #227487

See merge request gitlab-org/gitlab!36382

Adds over_storage_limit? method to EE::Namespace

See merge request gitlab-org/gitlab!36358

Add a tip to chatops_on_gitlabcom.md step 1 to help in the process

See merge request gitlab-org/gitlab!36477

Create new operations/metrics page

See merge request gitlab-org/gitlab!36500

Mark both the new operations/metrics page and the operations/ page
as belonging to Monitor.

Revert "Merge branch 'gitlab-json-multi' into 'master'"

See merge request gitlab-org/gitlab!36498

Count health status only for opened issues

See merge request gitlab-org/gitlab!36359

Geo Settings Form - Remove Old Code

Closes #216134

See merge request gitlab-org/gitlab!35879

Enable pagination for the Jira Issues controller

See merge request gitlab-org/gitlab!36126

for jira issue controller

Add Snowplow event for expanding security widget

See merge request gitlab-org/gitlab!35909

This reverts merge request !35527

Default Feature Flag Strategy Dropdown to All Users

See merge request gitlab-org/gitlab!35883

Default to all users for new flags and existing flags

Move the Operations and Feature Flags page

See merge request gitlab-org/gitlab!36468

The /user/project/operations directory is moving to /operations,
and I need to start the move by moving the index page to the new
location.

Enable confidential_epics flag by default

See merge request gitlab-org/gitlab!36271

Defaults to on for confidential_epics feature flag.

Make "show labels" toggle persist with localStorage

See merge request gitlab-org/gitlab!34728

https://gitlab.com/gitlab-org/gitlab/-/merge_requests/34728

Add system note for alert when creating issue

See merge request gitlab-org/gitlab!36370

Fix glob in stylelint task and subsequent errors

See merge request gitlab-org/gitlab!32417

- the new tests use vue/test-utils and it was confusing to
  mix those tests in with existing ones, so I separated them
  out into their own describe block

- fix test title to say it tests when something does not
  happen

- the defend/secure team wants to track how many users view the security
  report widget in merge requests
- added a new snowplow event to track the expansion of the widget
- ensured that it only tracked one event per page load
- add/update tests

Remove prepend-top-5 CSS class

See merge request gitlab-org/gitlab!32882

- by using stylelint autofix
- by disabling certain rules for the affected lines