Prepare a codeowners file for github actions

.github/CODEOWNERS

@@ -0,0 +1,49 @@
+# Default code owners
+* @pablintino @lewisdenny
+
+# Adoption
+roles/adoption_osp_deploy @openstack-k8s-operators/adoption-core-reviewers
+
+# Compliance
+roles/compliance @openstack-k8s-operators/security
+
+# DCN
+roles/ci_dcn_site @openstack-k8s-operators/dcn
+playbooks/dcn.yml @openstack-k8s-operators/dcn
+
+# Must gather
+roles/os_must_gather @openstack-k8s-operators/must-gather
+
+# NFV
+roles/idrac_configuration @openstack-k8s-operators/nfv
+roles/switch_config @openstack-k8s-operators/nfv
+roles/tofu @eshulman2 @openstack-k8s-operators/nfv
+
+
+# Polarion
+roles/polarion @tosky @ciecierski @jparoly @jirimacku
+
+# Report portal
+roles/reportportal @jirimacku @dsariel @sdatko
+
+# Shiftstack
+roles/shiftstack @rlobillo @eurijon
+
+# Storage
+roles/cifmw_block_device @openstack-k8s-operators/storage
+roles/cifmw_ceph_client @openstack-k8s-operators/storage
+roles/cifmw_ceph_spec @openstack-k8s-operators/storage
+roles/cifmw_cephadm @openstack-k8s-operators/storage
+roles/cifmw_create_admin @openstack-k8s-operators/storage
+playbooks/ceph.yml @openstack-k8s-operators/storage
+
+# Storage
+roles/nat64_appliance @hjensas
+roles/ci_lvms_storage @fultonj @fmount @abays
+roles/ci_local_storage @fultonj @fmount @abays
+
+# Update
+roles/update @openstack-k8s-operators/updates
+
+# Validations
+roles/validations @bshephar @drosenfe