This fix deprecates and redirects /origin/branches?origin_url=<url> and
/origin/<url>/branches to /snapshot/branches/
- test fixes
- documentation changes

Related to T3608
Fixes T3687

Deposits come from other sources than HAL now.

Build cache feature is now available in webpack 5.x, no need to use
an extra loader.

docutils 0.18 just got released but it breaks the _HTTPDomainDocVisitor
due to a missing visit_system_message method, so add it to fix the new
errors that appeared.

At the time there were some specific processings for github,
sourceforge, bitbucket and gitlab repo URLs validation but
not anymore so some code can be simplified now.

The assumption that URL paths to git repos for the git.code.sf.net
netloc are necessarily prefixed by /p/ is wrong.

Related to T3690

When setting an unsupported value for the request Accept header when
querying the /api/1/graph/ endpoint, an error was raised as the Django
DRF response does not have the accepted_media_type attribute set in
that case, leading to a 500 HTTP status code.

So ensure a proper JSON error response will be generated with the
406 HTTP status code when submitting such requests.

The origin visit type were mistyped which rendered those actually not visited. This is
now properly fixed upstream.

Related to T3675

This fix deprecates and redirects /origin/log?origin_url=<url> and
/origin/<url>/log to /snapshot/log/
- Generic function to redirect to a new route.
- Generic logic to forward url args and query params.
- Initial tests for snapshot view.
- Documentation updates

Related to T3608

Users with the "swh.web.admin.list_deposits" permission (deposit clients)
will be able to access the deposits administration interface.

Only their own deposits will be displayed.

Related to T3174

Recent changes in swh-web tests broke the debian package builds.

When building debian packages, the pytest command is not available in build
environment and must be executed through "python3 -m pytest" instead.

Debian buster packages a quite old version of pytest (3.10.1) and some
pytest hooks parameters and CLI options are missing compared to upstream
version so workaround these issues.

Also silent non critical warnings related to the use of hypothesis and
pytest function scoped fixtures as they add a lot of noise in pytest
reports.

When a save request has been rejected, the rejection note can be
displayed by clicking on the info icon in the save request tables.

Related to T3256

In the save code now administation page, display a new modal when
rejecting a save request enabling to add a rejection note through
the use of a text area.

Default behavior is to enter a custom note but a couple of prefilled
rejection notes can be selected for the following cases:

  - the origin URL is not a repository link
  - the visit type for the origin URL is not valid
  - the origin URL cannot be found

Related to T3256
Related to T3257

File has been renamed in a recent commit.

An error 500 was returned instead of a 404 status code.

Some tests input data returned by swh-web fixtures are sampled from
filtered objects stored in a static test archive.

In order to reproduce any failing test with the same fixture data:

- add a new autouse function scope fixture setting the random seed
  to current time before each test execution and putting that seed
  in cache

- implement custom pytest reporting which adds a new section detailing
  the random seeds used for each failing test and the pytests commands
  to reproduce the failures

- add a new pytest option --swh-web-random-seed enabling to explicitly
  specify the random seed that will be used to run the tests

Some tests input data returned by fixtures are sampled from filtered
objects stored in a static test archive.

In order to avoid repeating the same filtering operations multiple
times, put these filtered data in cache.

Related to T3658

As this is done through a decorator to replace a variable in a docstring,
it has the side effect to call swh-scheduler API when importing the module.

This is not required when running tests so do not fetch that list of
visit types in that case.

Apart a couple strategies who are still used in some swh-web test inputs,
turn the remaining ones into pytest fixtures.

Closes T3603

Related to T3603

Related to T3603

Related to T3603

Related to T3603

Related to T3603

Using such hypothesis strategies have several drawbacks so let's
turn them into pytest fixtures as it feels a better way to do so.

Related to T3603

Add an extra parameter called directory_url in the snapshot_context.
To fix the missing URL to the code (directory) view in case the
snapshot is missing an origin context.

Fixes T3644

swh.model.swhids module should be used instead from now on.

Also remove references to *_identifier functions in documentation.

Users with the "swh.web.api.save_origin" permission:

  - will not be rate limited on the /api/1/origin/save/ endpoint

  - will have their save requests immediately accepted

It ensures it will be ignored by git and will not be committed accidentally.

Ensure to restore origin visits visualization state (aka visits filtering)
when reloading page.

Handle "created" and "not_found" statuses in origin visits visualization.

Put visit statuses colors in a dedicated file in order to share them
between modules.