Docs: Raise minimum K8s version to 1.12

See merge request gitlab-org/gitlab!19546

As part of upgrading to kubectl 1.13
in https://gitlab.com/gitlab-org/gitlab/issues/30495
we also should raise the minimum cluster version, as
https://kubernetes.io/docs/setup/release/version-skew-policy/#kubectl
means we support 1.12, 1.13 and 1.14

See also https://gitlab.com/gitlab-org/charts/gitlab/issues/1389

Unquarantine file locking spec

Closes #35153

See merge request gitlab-org/gitlab!19657

Issue https://gitlab.com/gitlab-org/gitlab/issues/35254 does not reproduce anymore

Merge branch '32458-update-group-creation-url-so-it-is-always-unique-and-does-not-generate-an-error' into 'master'

Uniquify path slug creation from group name

Closes #32458

See merge request gitlab-org/gitlab!17394

Suggests a unique path for a group with an ajax call
Checks manual path inputs and warns users if already exists

Fetch cycle analytics stages groups and events separately

See merge request gitlab-org/gitlab!18514

For https://gitlab.com/gitlab-org/gitlab/issues/13076
we need to fetch cycle analytics data from
the /-/analytics dedicated endpoints introduced
in https://gitlab.com/gitlab-org/gitlab/merge_requests/18208

Remove unneeded lines

Add font-size utilities based on Pajamas typescale specifications

See merge request gitlab-org/gitlab!19643

Remove IIFEs from network.js

See merge request gitlab-org/gitlab!19254

Resolve "Remove IIFEs from project_select.js"

Closes #34624

See merge request gitlab-org/gitlab!19288

Fix uninitialized constant SystemDashboardService in custom dashboards

See merge request gitlab-org/gitlab!19453

Obtain merge commit via API for fast-forward plus squash merge

Closes #24711

See merge request gitlab-org/gitlab!17052

Definition of done: performance and availability implications of new changes

See merge request gitlab-org/gitlab!18744

Resolve "Replace raven-js with @sentry/browser"

Closes #26138

See merge request gitlab-org/gitlab!17715

Adds a min height to Vue last commit widget

See merge request gitlab-org/gitlab!19377

Conan snapshot and manifest API endpoints

See merge request gitlab-org/gitlab!16418

Conan endpoints for returning 'snapshot' and 'manifest'
data to the conan CLI. This follows the v1 conan API.

PackagesConanFileMetadata is created to store metadata for
conan package files.

Remove plaintext token values for feature flags clients

See merge request gitlab-org/gitlab!18923

Remove WikiService#get_formatted_data RPC

See merge request gitlab-org/gitlab!19627

Update conan docs to say 12.5

See merge request gitlab-org/gitlab!19230

Fix conan docs to show correct version of 12.5 for release

Cancel pending stuck jobs when they are pending AND stuck

Closes gitlab-com/support/docs#31

See merge request gitlab-org/gitlab!19622

Pass file type to report download endpoint

See merge request gitlab-org/gitlab!19247

Remove check supports_drop_index_concurrently?

See merge request gitlab-org/gitlab!19489

Show correct total number of commit diff's changes

See merge request gitlab-org/gitlab!19424

Resolve "Artifact-based view for Junit XML"

Closes #24792

See merge request gitlab-org/gitlab!18255

Added tests tab to pipelines detail
Created new Vue components for test detail
Added temporary data formatting
Updated pipelines bundle to load new components

Fix two Gitaly related mistakes in architecture diagram (documentation)

See merge request gitlab-org/gitlab!19565

Fix api docs for deleting project cluster

See merge request gitlab-org/gitlab!19558

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Connect self-monitoring project to internal Prometheus

See merge request gitlab-org/gitlab!19369

- Connect the self-monitoring project to the internal Prometheus
without needing to add the internal Prometheus address to the
outbound local requests whitelist since adding a URL to the outbound
local requests whitelist allows any project within that GitLab instance
to connect to the whitelisted URL.

This RPC has gone unused as far as I can see, so I'm removing it to
decrease the API surface for Gitaly.

UX improvements to Vue file listing refactor

See merge request gitlab-org/gitlab!19488