templates/composer: set DISTRO_ALIASES for composer

Set the RHEL release names without the minor version to point to the
latest GA release. Set the 'rhel-10.0' to the latest RHEL-9 minor
release in development, so that one can start building RHEL-10 images
without referencing RHEL-9.

Signed-off-by: Tomáš Hozza <thozza@redhat.com>

templates/composer.yml

@@ -124,6 +124,8 @@ objects:
                 key: dsn
                 name: "${GLITCHTIP_DSN_NAME}"
                 optional: true
+          - name: DISTRO_ALIASES
+            value: ${DISTRO_ALIASES}
           ports:
           - name: composer-api
             protocol: TCP
@@ -495,3 +497,6 @@ parameters:
   - name: GLITCHTIP_DSN_NAME
     value: "composer-stage-dsn"
     description: Name of the secret for connecting to sentry/glitchtip
+  - description: Distro name aliases
+    name: DISTRO_ALIASES
+    value: "rhel-7=rhel-7.9,rhel-8=rhel-8.9,rhel-9=rhel-9.3,rhel-10.0=rhel-9.4"