Expose HTTP code during GitHub importer errors

See merge request gitlab-org/gitlab!83818

This change adjusts the message returned to the user
when a GitHub import operation fails to include the
response HTTP code.

This is useful when the HTTP body is empty, such as
during the use of reverse proxies in accessing a
GitHub Enterprise instance over the internet.

The presence of a HTTP code can help establish if
a connection was at least made successfully and
the HTTP code can further be traced in their own
proxy or GitHub Enterprise logging for further
troubleshooting.

The logs already carry this information, but on
SaaS this is currently not visible due to
https://gitlab.com/gitlab-com/gl-infra/reliability/-/issues/15470

Changelog: other

Allow restore tasks to be skipped using SKIP

See merge request gitlab-org/gitlab!83783

Add troubleshooting for connectivity problems

See merge request gitlab-org/gitlab!83647

Add tutorial metadata

See merge request gitlab-org/gitlab!83830

Move 'paused' removal milestone to 16.0

See merge request gitlab-org/gitlab!83881

Add tests to the CI schema

See merge request gitlab-org/gitlab!83047

- These are tests taken from schemastore at commit
`6b7856dc5e8ed774cbbf3952847b17c90df6396f`
- Removed `missing_dependency_failure` from `retry:when` tests since they
are not recognized as valid keywords in the schema.
- Add toValidateJsonSchema matcher

Redirect deprecated SSE to Web IDE

See merge request gitlab-org/gitlab!80347

Fix No such file or directory in delete job

See merge request gitlab-org/gitlab!83784

Revert "Merge branch 'pks-gitaly-runtime-dir' into 'master'"

See merge request gitlab-org/gitlab!83869

Mention the /attention quick action

See merge request gitlab-org/gitlab!83872

Let's explain what attention requests are, so if someone comes to the
quick actions page first, they can get answers.

On this page, we should mention the quick action more prominently.

Use GlAvatar in project_list_item component

See merge request gitlab-org/gitlab!83806

Fix wrong slash being used

See merge request gitlab-org/gitlab!83828

Fix wrong removal milestone in comment

See merge request gitlab-org/gitlab!83727

Remove references to Shibboleth from the documentation

See merge request gitlab-org/gitlab!83708

Quarantine UsageDataNonSqlMetrics failing test

See merge request gitlab-org/gitlab!83768

This reverts merge request !83750

DEQUARANTINE : Create Merged merge request can be reverted

See merge request gitlab-org/gitlab!83690

Fix Style/MixinUsage offenses

See merge request gitlab-org/gitlab!83594

Ignore format of unmatched route

See merge request gitlab-org/gitlab!83523

Resolve Performance/DeletePrefix rubocop offenses

See merge request gitlab-org/gitlab!81331

Do not include highlighted_diff_email css for each note for new review email

See merge request gitlab-org/gitlab!83385

Use the $CI_DEFAULT_BRANCH variable in the metadata Danger rule

See merge request gitlab-org/gitlab!83773

Update createAlert jsdocs

See merge request gitlab-org/gitlab!83813

Move Style/SpecialGlobalVars into separate TODO file

See merge request gitlab-org/gitlab!83725

Lazy initialization for user popovers

See merge request gitlab-org/gitlab!80597

Support `project`, `group` and `user` actors for `incubation-5mp` feature flag

See merge request gitlab-org/gitlab!83339

Clean-up removed gitlab slack application metric

See merge request gitlab-org/gitlab!83655

Workhorse docs: fix linting errors

See merge request gitlab-org/gitlab!83782

Fix the issues that will prevent this page from moving into the
regular docs directory. Also, add metadata for the Source Code group.

Remove header_read_timeout_buffered_io feature flag

See merge request gitlab-org/gitlab!83729

Enable new Group Runners administration view

See merge request gitlab-org/gitlab!82622

Remove feature flag `spread_parallel_import`

See merge request gitlab-org/gitlab!83608

See https://gitlab.com/gitlab-org/gitlab/-/merge_requests/83725