Rename aliases to openstack-* and add arxcruz, kstrenkova

Rename shiftstack-approvers/reviewers to openstack-approvers/reviewers
to match the naming convention used across all other shiftstack org
repos (shiftstack-ci, gazelle, ci-configs, merge-bot, etc.).

Add arxcruz (Arx Cruz) and kstrenkova (Katarina Strenkova) as
approvers and reviewers.

Assisted-By: Claude Code
Change-Id: I9bb750cae1a5c8bfd6a16d321b87cab78d58078e
Signed-off-by: Itay Matza <imatza@redhat.com>

Author: imatza-rh

.github/CODEOWNERS

@@ -1,4 +1,4 @@
 # Default reviewers for all files
 # https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
 
-* @dlaw4608 @ekuris-redhat @eshulman2 @gryf @imatza-rh @mandre @stephenfin @tusharjadhav3302 @winiciusallan
+* @arxcruz @dlaw4608 @ekuris-redhat @eshulman2 @gryf @imatza-rh @kstrenkova @mandre @stephenfin @tusharjadhav3302 @winiciusallan

OWNERS

@@ -2,7 +2,7 @@
 # This file just uses aliases defined in OWNERS_ALIASES.
 
 approvers:
-  - shiftstack-approvers
+  - openstack-approvers
 
 reviewers:
-  - shiftstack-reviewers
+  - openstack-reviewers

OWNERS_ALIASES

@@ -1,22 +1,26 @@
 # See the OWNERS_ALIASES docs: https://git.k8s.io/community/contributors/guide/owners.md#OWNERS_ALIASES
 
 aliases:
-  shiftstack-approvers:
+  openstack-approvers:
+    - arxcruz
     - dlaw4608
     - ekuris-redhat
     - eshulman2
     - gryf
     - imatza-rh
+    - kstrenkova
     - mandre
     - stephenfin
     - tusharjadhav3302
     - winiciusallan
-  shiftstack-reviewers:
+  openstack-reviewers:
+    - arxcruz
     - dlaw4608
     - ekuris-redhat
     - eshulman2
     - gryf
     - imatza-rh
+    - kstrenkova
     - mandre
     - stephenfin
     - tusharjadhav3302