Python Requirements Update

refactor: Move CourseEditLTIFieldsEnabledFlag to lti_consumer [BD-38] [TNL-8104]

This moves the CourseEditLTIFieldsEnabledFlag from edx-platform to this repo. This allows using the flag from both lms and studio.

commits
=======
- build(deps): run `make upgrade`

Bumps [djangorestframework](https://github.com/encode/django-rest-framework) from 3.9.4 to 3.11.2.
- [Release notes](https://github.com/encode/django-rest-framework/releases)
- [Commits](https://github.com/encode/django-rest-framework/compare/3.9.4...3.11.2

)

---
updated-dependencies:
- dependency-name: djangorestframework
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

commits
=======
- fix: use local common_constraints file

commits
=======
- build(deps): allow wider range of djangorestframework
- build(deps): remove py35-related constraints
- build: save common_constraints.txt locally

to catch minor/patch version updates.

as we no longer support that version of Python.

so that dependabot can access the constraints file and automatically
create security PRs; it fails if the constraints file is specified via
remote URL.

The 2.10.0 release couldn't upload to PyPI because of ReStructured Text
errors. Add some checking so that we'll know next time.

This removes feature flags that were in place for development, but aren't needed in production.

* feat: set LTI 1.3 support enabled by default

* feat: Improve settings wording

* chore: Update translation files

* chore: Version bump

* quality: Fix pylint errors and improve waffleflag documentation

* doc: Add changes to changelog

* feat: Remove LTI 1.3 flags and enable services by default

* doc: Update NRPS ADR

* doc: Fix typo

* Update README.rst

Co-authored-by: Ned Batchelder <ned@nedbatchelder.com>

* Update README.rst

Co-authored-by: Ned Batchelder <ned@nedbatchelder.com>

* Update setup.py

Co-authored-by: Ned Batchelder <ned@nedbatchelder.com>

Co-authored-by: Ned Batchelder <ned@nedbatchelder.com>

This depends on a new API in edx-platform: get_course_members

The Community Engineering team has agreed that we would only like to get tagged on Python upgrade notifications, not paged in Ops Genie. This PR removes OG notification and also removes the team-reviewers as that was not working; we are moving to being tagged in the CODEOWNERS file.

Background
==========
As part of our Squad-based ownership, we should stay on top of what
happens in these repositories. However, due to the number of
repositories (and subsequently pull requests) across the edX ecosystem,
it is challenging to stay on top of notifications, separating the
'signal' from the 'noise'. Email filters can go a long way to taming
Inbox notifications, but this is manual and requires maintenance as
Squad ownership changes. It also fails to account for Github-specific behavior.

Proposal
========
By leveraging Github support for `CODEOWNERS` files [1],
we can ensure that our team is at least CCed explicitly, here,
in the form a requested review. This request is just that, a request,
not a requirement; we are not enacting any new merge requirements
at this time.

- [1] https://docs.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners

build: update escalation email address

s/teaching-and-learning@edx.opsgenie.net/community-engineering@edx.opsgenie.net/

feat: Added upgrade-python-requirements workflow

docs: ADR to decide the future of the CourseEditLTIFieldsEnabledFlag [BD-03] [TNL-7945]

This fixes issues with some tools that assume `aud` as a plaing string even though that doesn't follow https://tools.ietf.org/html/rfc7519#section-4.1.3

This ADR proposes that we use the existing CourseEditLTIFieldsEnabledFlag
for LTI Course tabs in addition LTI XBlocks, and move it to this repo as
intended via EDUCATOR-121.