Flatten exception details in API and controller logs

See merge request gitlab-org/gitlab!20434

Elasticsearch and Fluentd don't handle nested objects well: the
`exception` field is currently parsed as a string and can't be searched
with the specific keywords. As we do with Gitaly logs, flatten the
fields to `exception.class`, `exception.message`, and
`exception.backtrace` to enable better searchability.

Notify user when over 1000 epics in roadmap

Closes #33338

See merge request gitlab-org/gitlab!19419

Remove visual review app token step

Closes #30132 and #29067

See merge request gitlab-org/gitlab!18141

Remove epics from project label info

See merge request gitlab-org/gitlab!20368

Update Tomcat version in `plantuml.md`

See merge request gitlab-org/gitlab!19594

Tomcat 7 is not anymore available for Debian/stable:
https://packages.debian.org/search?suite=stretch&searchon=names&keywords=tomcat

Update external link to provider in cluster settings

See merge request gitlab-org/gitlab!20425

Provide access to job token as a helper

See merge request gitlab-org/gitlab!19793

Fix typo in cluster management project docs

See merge request gitlab-org/gitlab!20576

Quarantine merge request license spec

See merge request gitlab-org/gitlab!20581

Remove `remove_jid` method from ProjectImportState

See merge request gitlab-org/gitlab!20500

Make use of login flow on perf bar test

See merge request gitlab-org/gitlab!20473

Make use of login flow on monitor test

See merge request gitlab-org/gitlab!20472

Make use of login flow on configure test

See merge request gitlab-org/gitlab!20471

Testing to make sure the visual review app link
does not show up when feature flag is disabled
and vice versa.

Certify the 50k reference architecture in the docs

Closes gitlab-org/quality/performance#66

See merge request gitlab-org/gitlab!19599

Resolve "environment rollback was not friendly"

Closes #31649

See merge request gitlab-org/gitlab!20121

Re add tiller namespace to helm commands

See merge request gitlab-org/gitlab!20366

Add GraphQL mutation to mark all todos done for a user

See merge request gitlab-org/gitlab!19482

Upgrade charlock_holmes to v0.7.7

See merge request gitlab-org/gitlab!20546

Remove all references of BoardService in the list.js file

See merge request gitlab-org/gitlab!20145

Add use case content for CI cache key documentation

See merge request gitlab-org/gitlab!20442

Remove Extra User with ID Block

See merge request gitlab-org/gitlab!20490

This fixes some build issues on MacOS:
https://github.com/brianmario/charlock_holmes/compare/0.7.6..v0.7.7

Prepare releases/../app_spec for boostrap2

See merge request gitlab-org/gitlab!20541

Caution users about promoting project milestone

See merge request gitlab-org/gitlab!20203

Add CI variable to show when Auto-DevOps is explicitly enabled

See merge request gitlab-org/gitlab!20332

Update links in /development and /university

See merge request gitlab-org/gitlab!19749