Port `read_cross_project` ability from EE

See merge request gitlab-org/gitlab-ce!17208

Add Tip about Push to Create project on New Project page

Closes #42938

See merge request gitlab-org/gitlab-ce!17154

Enable "Legacy Authorization" by default when creating a Cluster on GCP

Closes #41619

See merge request gitlab-org/gitlab-ce!17302

Add a button on the project page to set up a Kubernetes cluster and enable  Auto DevOps

Closes #42431

See merge request gitlab-org/gitlab-ce!16900

Remove bundle tag for ui help

Closes #41341

See merge request gitlab-org/gitlab-ce!17301

GKE 1.8 has RBAC on by default, since GKE has bumped the default version
to 1.8.7 RBAC is now on, and we don't support that out of the box.

This was also avoiding cluster applications (tiller, prometheus, etc), to
be installed.

Closes #41619

Resolve "cache key for CI stopped working"

Closes #43373

See merge request gitlab-org/gitlab-ce!17260

[ci skip]

Use dynamic imports in dispatcher (Part 3)

See merge request gitlab-org/gitlab-ce!17277

Add link to project visibility settings in push to create project docs

See merge request gitlab-org/gitlab-ce!17292

Docs milestones refactor

See merge request gitlab-org/gitlab-ce!17247

Docs: search/replace "Enterprise Edition" and adjust when applicable

See merge request gitlab-org/gitlab-ce!17161

Since the redactor can be run on multiple documents at once and
query results are stored in the request store.

Fix 500 error when loading an invalid upload URL

Closes gitlab-ee#4998

See merge request gitlab-org/gitlab-ce!17267

Revert "Merge branch 'tc-info-version-check' into 'master'"

See merge request gitlab-org/gitlab-ce!17269

See
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/16900#note_60175507

Resolve "document where user clone/fetch activity appears in the logs"

Closes #43416

See merge request gitlab-org/gitlab-ce!17227

See

 - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/16900#note_60163789
 - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/16900#note_60164324

Harmonize CE and EE JS code

See merge request gitlab-org/gitlab-ce!17264

Resolve "ActionView::Template::Error: 366..524 out of range"

Closes #42332

See merge request gitlab-org/gitlab-ce!17262

Resolve "Spec failure: spec/features/users_spec.rb"

Closes #43495

See merge request gitlab-org/gitlab-ce!17289

Backport of Webpack auto include for EE imports

See merge request gitlab-org/gitlab-ce!17282

Signed-off-by: Rémy Coutable <remy@rymai.me>

Signed-off-by: Rémy Coutable <remy@rymai.me>

Rugged sometimes chops a context line in between bytes, resulting in the context
line having an invalid encoding: https://github.com/libgit2/rugged/issues/716

When that happens, we will try to detect the encoding for the diff, and
sometimes we'll get it wrong. If that difference in encoding results in a
difference in string lengths between the diff and the underlying blobs, we'd
fail to highlight any inline diffs, and return a 500 status to the user.

As we're using the underlying blobs, the encoding is 'correct' anyway, so if the
string range is invalid, we can just discard the inline diff highlighting. We
still report to Sentry to ensure that we can investigate further in future.

Signed-off-by: Rémy Coutable <remy@rymai.me>