Remove pipenv cache from ECR workflows

Why these changes are being introduced:
There is a known bug in `actions/setup-python` related to caching:
actions/setup-python#436
that we experienced with the first auto-deploy runs for the
alma-creditcardslips application. As a quick fix, we simply remove
the cache option for pipenv from the step and everything runs smoothly.

How this addresses that need:
* Remove `cache: 'pipenv'` from the actions/setup-python for both the
dev and stage ecr-shared-deploy- workflows.

Relevant ticket(s):
* https://mitlibraries.atlassian.net/browse/IN-735

.github/workflows/ecr-shared-deploy-dev.yml

@@ -82,7 +82,6 @@ jobs:
         uses: actions/setup-python@v4
         with:
           architecture: x64
-          cache: 'pipenv'
 
       - name: Get Ruby
         # Run the Ruby setup setup only when there is a .ruby-version file in the 

.github/workflows/ecr-shared-deploy-stage.yml

@@ -63,7 +63,6 @@ jobs:
         uses: actions/setup-python@v4
         with:
           architecture: x64
-          cache: 'pipenv'
 
       - name: Get Ruby
         # Run the Ruby setup setup only when there is a .ruby-version file in the