Add force-bump-pull-request workflows

Adds two new workflows to create force bump PRs:

The manual version can be triggered via the github actions tab.

The scheduled version runs on Saturday and will generate PRs for
main and the most recent FR branch.

Jira: OSPRH-15737

Author: dprince

.github/workflows/force-bump-pr-manual.yaml

@@ -0,0 +1,11 @@
+name: Manually Trigger a Force Bump PR
+
+on:
+  workflow_dispatch:
+
+jobs:
+  call-build-workflow:
+    uses: openstack-k8s-operators/openstack-k8s-operators-ci/.github/workflows/force-bump-pull-request.yaml@main
+    with:
+      operator_name: openstack
+      branch_name: ${{ github.ref_name }}

.github/workflows/force-bump-pr-scheduled.yaml

@@ -0,0 +1,12 @@
+name: Scheduled Force Bump PR
+
+on:
+  schedule:
+    - cron: '0 10 * * 6'  # 10AM UTC Saturday
+
+jobs:
+  call-build-workflow:
+    if: github.ref == 'refs/heads/main' && github.repository_owner == 'openstack-k8s-operators'
+    uses: openstack-k8s-operators/openstack-k8s-operators-ci/.github/workflows/force-bump-branches.yaml@main
+    with:
+      operator_name: openstack