[stable-4.6] Cleanup README, workflows, configs relevant only in master; update galaxykit version, pulp-ci-centos version (#2622)

* .github - drop everything except workflows

* .github/workflows - drop everything but backported-labels, cypress, pr-checks, stable-release and scripts

the rest is either not relevant to stable branches at all, or is run from the master branch

* .travis - drop, unused except for deploy-cloud

* drop ephemeral scripts - build_deploy.sh ci.sh pr_check.sh

* drop husky

* update README to drop sections only maintained in master

* drop .cloud-stage-cron.enabled - used only on master

* install released galaxykit instead of github main

last currently released galaxykit is 0.11.1

* Build from pulp-ci-centos:3.21, not latest

Author: himdel

.cloud-stage-cron.enabled

@@ -40,7 +40,7 @@ jobs:
     - name: "Install galaxykit dependency"
       run: |
         # pip install git+https://github.com/ansible/galaxykit.git@branch_name
-        pip install git+https://github.com/ansible/galaxykit.git
+        pip install galaxykit
 
     - name: "Set env.SHORT_BRANCH, env.GALAXY_NG_COMMIT"
       run: |
@@ -75,7 +75,7 @@ jobs:
 
         echo '# Containerfile'
         echo '\
-          FROM ghcr.io/pulp/pulp-ci-centos:latest
+          FROM ghcr.io/pulp/pulp-ci-centos:3.21
 
           COPY --chmod=644 ansible-sign.key /tmp/
           COPY --chmod=755 collection-sign.sh /var/lib/pulp/scripts/

.github/ISSUE_TEMPLATE/config.yml

@@ -6,26 +6,6 @@ on:
 
 jobs:
 
-  check_commit:
-    runs-on: ubuntu-latest
-    if: ${{ github.base_ref == 'master' }}
-    steps:
-
-    - name: Checkout code
-      uses: actions/checkout@v2
-      with:
-        ref: ${{ github.event.after }}  # for PR avoids checking out merge commit
-        fetch-depth: 0  # include all history
-
-    - name: Run script to validate commits for both pull request and a push
-      env:
-        GITHUB_PR_COMMITS_URL: ${{ github.event.pull_request.commits_url }}
-        GITHUB_USER: ${{ github.event.pull_request.user.login }}
-        START_COMMIT: ${{ github.event.before }}
-        END_COMMIT: ${{ github.event.after }}
-      run: |
-        curl https://raw.githubusercontent.com/ansible/galaxy_ng/master/.ci/scripts/validate_commit_message_custom.py | python
-
   pr-checks:
     runs-on: ubuntu-latest
     steps: