RHEL-90: move RHSM configuration to ImageConfig structure

Move the RHSM configuration settings to `ImageConfig` structure and use
when handling subscriptions in `osPipeline`, `ec2BaseTreePipeline` and
`ostreeTreePipeline` functions.

Regenerate image test cases. While there are changed in the manifests,
the actual image configuration didn't change at all and thus the
`image-info` report was not changed.

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

test/data/manifests/rhel_90-aarch64-ec2-boot.json

@@ -913,6 +913,19 @@
               }
             }
           },
+          {
+            "type": "org.osbuild.rhsm",
+            "options": {
+              "subscription-manager": {
+                "rhsm": {
+                  "manage_repos": false
+                },
+                "rhsmcertd": {
+                  "auto_registration": true
+                }
+              }
+            }
+          },
           {
             "type": "org.osbuild.systemd-logind",
             "options": {
@@ -978,19 +991,6 @@
               "profile": "sssd"
             }
           },
-          {
-            "type": "org.osbuild.rhsm",
-            "options": {
-              "subscription-manager": {
-                "rhsm": {
-                  "manage_repos": false
-                },
-                "rhsmcertd": {
-                  "auto_registration": true
-                }
-              }
-            }
-          },
           {
             "type": "org.osbuild.fstab",
             "options": {