(CAT-2254) Remove puppet 7 / Ruby 2.7 related code

Following the EOL of Puppet 7, we are updating the codebase to
remove Puppet 7 related code. Automated testing, rubocop pins and
ruby 2.7 related code is removed amongst other things.

Author: LukasAud

.github/workflows/ci.yml

@@ -13,8 +13,6 @@ jobs:
     strategy:
       matrix:
         cfg:
-          - {puppet_version: '7', ruby: '2.7'}
-          - {puppet_version: '7', ruby: 'jruby-9.3.7.0'}
           - {puppet_version: '8', ruby: '3.2'}
           - {puppet_version: '8', ruby: 'jruby-9.4.2.0'}
     env:
@@ -51,7 +49,6 @@ jobs:
     strategy:
       matrix:
         cfg:
-          - {puppet_version: '7', ruby: '2.7'}
           - {puppet_version: '8', ruby: '3.2', extra: 'bundle config set with integration'}
     env:
       PUPPET_GEM_VERSION: ~> ${{ matrix.cfg.puppet_version }}

.github/workflows/nightly.yml

@@ -11,8 +11,6 @@ jobs:
     strategy:
       matrix:
         cfg:
-          - {puppet_version: '7', ruby: '2.7'}
-          - {puppet_version: '7', ruby: 'jruby-9.3.7.0'}
           - {puppet_version: '8', ruby: '3.2'}
           - {puppet_version: '8', ruby: 'jruby-9.4.2.0'}
     env:
@@ -49,7 +47,6 @@ jobs:
     strategy:
       matrix:
         cfg:
-          - {puppet_version: '7', ruby: '2.7'}
           - {puppet_version: '8', ruby: '3.2', extra: 'bundle config set with integration'}
     env:
       PUPPET_GEM_VERSION: ~> ${{ matrix.cfg.puppet_version }}