fix: copy implicit dependencies from paver.in to kernel.in

These packages were installed transitively through paver.in, but they
are used as direct dependencies in edx-platform application code:

* psutil
* pymemcache
* wrapt

Since we are demoting paver.in to be a dev-only dependency (with plans
to remove paver.in entirely), we need to make those three packages
explicit dependencies in kernel.in

Part of: openedx#34467

requirements/edx/kernel.in

@@ -124,13 +124,15 @@ openedx-django-wiki
 path
 piexif                              # Exif image metadata manipulation, used in the profile_images app
 Pillow                              # Image manipulation library; used for course assets, profile images, invoice PDFs, etc.
+psutil                              # Library for retrieving information on running processes and system utilization
 pycountry
 pycryptodomex
 pyjwkest
 # TODO Replace PyJWT usage with pyjwkest
 # PyJWT 1.6.3 contains PyJWTError, which is required by Apple auth in social-auth-core
 PyJWT>=1.6.3
 pylti1p3                            # Required by content_libraries core library to support LTI 1.3 launches
+pymemcache                          # Python interface to the memcached memory cache daemon
 pymongo                             # MongoDB driver
 pynliner                            # Inlines CSS styles into HTML for email notifications
 python-dateutil
@@ -157,5 +159,6 @@ unicodecsv                          # Easier support for CSV files with unicode
 user-util                           # Functionality for retiring users (GDPR compliance)
 webob
 web-fragments                       # Provides the ability to render fragments of web pages
+wrapt                               # Better functools.wrapped. TODO: functools has since improved, maybe we can switch?
 XBlock[django]                      # Courseware component architecture
 xss-utils                           # https://github.com/openedx/edx-platform/pull/20633 Fix XSS via Translations

requirements/edx/testing.in

@@ -28,6 +28,7 @@ freezegun                 # Allows tests to mock the output of assorted datetime
 httpretty                 # Library for mocking HTTP requests, used in many tests
 import-linter             # Tool for making assertions about which modules can import which others
 isort                     # For checking and fixing the order of imports
+mock                      # Deprecated alias to standard library `unittest.mock`
 pycodestyle               # Checker for compliance with the Python style guide (PEP 8)
 polib                     # Library for manipulating gettext translation files, used to test paver i18n commands
 pyquery                   # jQuery-like API for retrieving fragments of HTML and XML files in tests