fix: semi-temp fix to pin pip/pip-tools versions to prevent pip insta…

…ll failures (#4170)

.github/workflows/migrations-mysql8.yml

@@ -48,6 +48,7 @@ jobs:
         mysql -V
     - name: Install Python dependencies
       run: |
+        pip install pip==21.2.1 --upgrade  # set pip version to be compatible with deprecated pip version syntax
         pip install -r requirements/pip_tools.txt
         pip install -r requirements/production.txt
         pip uninstall -y mysqlclient

requirements/pip_tools.in

@@ -1,4 +1,4 @@
 -c constraints.txt
 
 # Dependencies to run compile tools
-pip-tools                           # Contains pip-compile, used to generate pip requirements files
+pip-tools==6.0                       # Contains pip-compile, used to generate pip requirements files

requirements/pip_tools.txt

@@ -10,7 +10,7 @@ click==8.1.3
     # via pip-tools
 packaging==23.1
     # via build
-pip-tools==6.13.0
+pip-tools==6.0
     # via -r requirements/pip_tools.in
 pyproject-hooks==1.0.0
     # via build