Add secret store unseal playbook for action runners

When CI action runners are rebooted, their secret store needs to be
unsealed.
Added unsealing playbook for them.

Author: seunghun1ee

etc/kayobe/ansible/secret-store/secret-store-unseal-action-runners.yml

@@ -0,0 +1,34 @@
+---
+- name: Unseal secret store on the ci-runners
+  any_errors_fatal: true
+  gather_facts: true
+  hosts: github-runners:gitlab-runners
+  vars:
+    vault_api_addr: http://127.0.0.1:8200
+  tasks:
+    - name: Set a fact about the virtualenv on the remote system
+      ansible.builtin.set_fact:
+        virtualenv: "{{ ansible_python_interpreter | dirname | dirname }}"
+      when:
+        - ansible_python_interpreter is defined
+        - not ansible_python_interpreter.startswith('/bin/')
+        - not ansible_python_interpreter.startswith('/usr/bin/')
+
+    - name: Ensure Python hvac module is installed
+      ansible.builtin.pip:
+        name: hvac
+        state: latest
+        extra_args: "{% if pip_upper_constraints_file %}-c {{ pip_upper_constraints_file }}{% endif %}"
+        virtualenv: "{{ virtualenv is defined | ternary(virtualenv, omit) }}"
+      become: "{{ virtualenv is not defined }}"
+
+    - name: Include secret store keys
+      ansible.builtin.include_vars:
+        file: "{{ kayobe_env_config_path }}/{{ stackhpc_ca_secret_store }}/kayobe-automation-keys.json"
+        name: secret_store_keys
+
+    - name: Apply unseal role
+      ansible.builtin.import_role:
+        name: stackhpc.hashicorp.vault_unseal
+      vars:
+        vault_unseal_keys: "{{ secret_store_keys.keys_base64 }}"