ci: remove eol terraform versions

Author: fabiomatavelli

.github/workflows/acceptance.yml

@@ -100,17 +100,6 @@ jobs:
       fail-fast: false
       matrix:
         terraform-version:
-          - '0.12.*'
-          - '0.13.*'
-          - '0.14.*'
-          - '0.15.*'
-          - '1.0.*'
-          - '1.1.*'
-          - '1.2.*'
-          - '1.3.*'
-          - '1.4.*'
-          - '1.5.*'
-          - '1.6.*'
           - '1.7.*'
         cloudstack-version:
           - 4.17.2.0