Updated ICP license in edx footer

Update edx-when to 0.1.5

update edx-enterprise version

ENT-1885

introduce Python API for BulkEmail Djangoapp

EDUCATOR-4290 support for provider and track

* run python modernize

* run isort

* Fix quality

INCR-253 Run python-modernize on lms/djangoapps/shoppingcart/management lms/djangoapps/shoppingcart/tests (#20554)

* run python modernize

* run isort

* Fix quality

* run python modernize

* run isort

* Fix python

* run python modernize

* run isort

* Fix quality

* Fix quality

INCR-306 Run python-modernize on lms/djangoapps/discussion/settings and lms/djangoapps/discussion/tests (#20619)

* run python modernize

* run isort

* Fix quality

* run python modernize

* run isort

* Fix quality

INCR-314 Run python-modernize on lms/djangoapps/grades/config and lms/djangoapps/grades/settings (#20611)

* run python modernize

* run isort

* Fix quality

* run python modernize

* run isort

* Fix quality

* run python modernize

* run isort

INCR-254 Run python-modernize on lms/djangoapps/shoppingcart/migrations and lms/djangoapps/shoppingcart/processors (#20556)

* run python modernize

* run isort

* Fix quality

* run python modernize

* run isort

* Fix quality

* run python modernize

* run isort

* run python modernize

* run isort

INCR-257 Run python-modernize on lms/djangoapps/bulk_email/migrations and lms/djangoapps/bulk_email/tests (#20563)

* run python modernize

* run isort

* Fix quality

INCR-262 Run python-modernize on lms/djangoapps/certificates/migrations and lms/djangoapps/certificates/views (#20558)

* run python modernize

* run isort

* Fix quality

INCR-263 Run python-modernize on lms/djangoapps/instructor_task/config and lms/djangoapps/instructor_task/management	 (#20559)

* run python modernize

* run isort

* Fix quality

INCR-274 Run python-modernize on lms/djangoapps/badges/events and lms/djangoapps/badges/tests (#20585)

* run python modernize

* run isort

* Fix quality

* run python modernize

* run isort

INCR-283 Run python-modernize on lms/djangoapps/program_enrollments/migrations and lms/djangoapps/program_enrollments/tests (#20578)

* run python modernize

* run isort

* Fix merge conflicts

* Fix merge conflict--file was deleted on master

* run python modernize

* run isort

* run python modernize

* run isort

* Fix quality

* run python modernize

* run isort

* run python modernize

* run isort

check course end date and verified mode for first purchase offer

Added logs

added time logs for bulk email

This also pins scipy to version <=1.2.1 in constraints.txt, as 1.3.0 requires py3.5 or above

Runtime Support for Staff Graded Points