C9S is now Base and not Test

Since release of C9 we use Base edition.

To resolve:

https://gitlab.cern.ch/linuxsupport/testing/image-ci/-/jobs/19377855

ci/c9s.yml

@@ -3,7 +3,6 @@ cs9_unman_physical:
   variables:
     OS: 9s
     ARCH: x86_64
-    EDITION: Test
   only:
     variables:
       - $TEST_OS9 == 'True' && $TEST_PHYSICAL == 'True' && $TEST_UNMANAGED == 'True'
@@ -15,7 +14,6 @@ cs9_unman_virtual:
     OS: 9s
     ARCH: x86_64
     DELETE_FAILURES: "False"
-    EDITION: Test
   only:
     variables:
       - $TEST_OS9 == 'True' && $TEST_VIRTUAL == 'True' && $TEST_UNMANAGED == 'True'
@@ -26,7 +24,6 @@ cs9_puppet_physical:
   variables:
     OS: 9s
     ARCH: x86_64
-    EDITION: Test
   only:
     variables:
       - $TEST_OS9 == 'True' && $TEST_PHYSICAL == 'True' && $TEST_PUPPET == 'True'
@@ -37,7 +34,6 @@ cs9_puppet_virtual:
   variables:
     OS: 9s
     ARCH: x86_64
-    EDITION: Test
   only:
     variables:
       - $TEST_OS9 == 'True' && $TEST_VIRTUAL == 'True' && $TEST_PUPPET == 'True'