add helper method vulnerability_scan_data? to reduce duplication

Clarify repository cleanup process

See merge request gitlab-org/gitlab!53161

Fix heading - Purging files from repo history doesn't reduce storage.

Update create issue e2e specs

See merge request gitlab-org/gitlab!52841

Add SSHTunel to Integration module

See merge request gitlab-org/gitlab!53131

UI text - Repo settings - push rules

See merge request gitlab-org/gitlab!52797

Updates 3 more testcase issue links in e2e specs

See merge request gitlab-org/gitlab!53177

Add index on starts_at/ends_at for oncall shifts

See merge request gitlab-org/gitlab!52961

Added New Keyboard Shortcuts to docs

See merge request gitlab-org/gitlab!52983

Docs: SAML external groups are supported in free edition

See merge request gitlab-org/gitlab!52980

Wait up to 60 seconds instead of 30 seconds till PIDs should exist.

See merge request gitlab-org/gitlab!53153

Replace bootstrap event strings with constants

See merge request gitlab-org/gitlab!52777

This replaces the usage of the following bootstrap event names with
constants defined in ~/lib/utils/constants.js.

| Event Name           | Constant           |
| -------------------- | ------------------ |
| `bv::hide:tooltip`   | `BV_HIDE_TOOLTIP`  |
| `bv::dropdown::show` | `BV_DROPDOWN_SHOW` |
| `bv::dropdown::hide` | `BV_DROPDOWN_HIDE` |

Reassign analytics flags to group::optimize

See merge request gitlab-org/gitlab!53024

Set `projects.has_external_wiki` to `DEFAULT false` and `NOT NULL`

See merge request gitlab-org/gitlab!50916

This change contains migrations for `projects.has_external_wiki` to
become a `NOT NULL` column that defaults to `FALSE`.

This is possible after the PG Trigger added in
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/49916 that always
maintains `projects.has_external_wiki` as a boolean and never a `NULL`.

It includes a data migration to set all historical `NULL` columns to be
either `TRUE` or `FALSE`.

The data migration also fixes the historical bad data for
`has_external_wiki`:
https://gitlab.com/gitlab-org/gitlab/-/issues/273574.

https://gitlab.com/gitlab-org/gitlab/-/issues/290715.

BulkImports: avoid infinity recursion on group migration

See merge request gitlab-org/gitlab!52931

Expand Linux cheat sheet's Networking section

See merge request gitlab-org/gitlab!52973

Refactor trigger block and spec

See merge request gitlab-org/gitlab!53151

Use codequality degradation factory

See merge request gitlab-org/gitlab!53069

Add btn-default class for the download button in graphs page

See merge request gitlab-org/gitlab!52857

The current subgroup migration strategy works iteratively, which means
that each level of a group tree is imported before moving to the next
level.

This becomes a problem when the target group is within the source group,
which creates a _infinity_ loop of import.

>> Example:

Given a group tree like:

- Group A
  - Group B
  - Group C
    - Group X
    - Group Y

If one decide to import the Group A into Group B, a recursion will
happen, making the import stop only when the depth limit is achieved or
some other database constraint, like the size of a group path.

- Group A
  - Group B
    - Group A
      - Group B
        - Group A
          - Group B
            - Group A
              - Group B
                - ...
              - Group C
                - Group X
                - Group Y
          - Group C
            - Group X
            - Group Y
      - Group C
        - Group X
        - Group Y
  - Group C
    - Group X
    - Group Y

To fix that, destination namespaces cannot be a descendant of the source
group.

Related to: https://gitlab.com/gitlab-org/gitlab/-/issues/300445

MRs that modify GraphQL complexity require a changelog

See merge request gitlab-org/gitlab!53124

Separate sections in user settings pages layout

See merge request gitlab-org/gitlab!53091

Fix typo in JSDoc comment

See merge request gitlab-org/gitlab!53164

Update deployment frequency graphs to use UTC dates

See merge request gitlab-org/gitlab!52919

This commit updates the deployment frequency charts to always use UTC
dates when computing offsets and when communicating with the API.

New Crowdin translations - 01 Feb 2021

See merge request gitlab-org/gitlab!53047

Remove ref_path from coverage CSV path

See merge request gitlab-org/gitlab!53063

Updated intro text

See merge request gitlab-org/gitlab!53098

Update Blue-Green Deploy Docs with Traffic Weight Shaping

See merge request gitlab-org/gitlab!52795

Serialize reference attribute on epics autocomplete endpoint

See merge request gitlab-org/gitlab!49744

Add btn-icon class for action buttons in the user profile

See merge request gitlab-org/gitlab!52901