Install py-pip instead of pyton

For some reason, the python package didn't include pip. Since we weren't using python for any other purpose in this build, I replaced it with py-pip.

.gitlab-ci.yml

@@ -5,7 +5,7 @@ before_script:
   - IMAGE_TAG=git-${CI_COMMIT_SHA:0:8}
   - IMAGE_NAME="enterprise-integrations/iics_secure_agent:${IMAGE_TAG}"
   - ECR_IMAGE_NAME="${AWS_ACCOUNT_ID}.dkr.ecr.us-east-1.amazonaws.com/enterprise-integrations/iics_secure_agent:${IMAGE_TAG}"
-  - apk update && apk add groff less && apk add python3
+  - apk update && apk add groff less && apk add py-pip
   - pip3 install awscli
   - $(aws ecr get-login --no-include-email --region us-east-1)