(CAT-2286) Remove puppet 7 infrastructure

Puppet 7 is EOL. Therefore, we can remove the test infrastructure for it.
This commit aims to clear up any testing/config infrastructure related to
Puppet 7 and, by extension, Ruby 2.7.

Author: LukasAud

.github/workflows/ci.yml

@@ -19,7 +19,6 @@ jobs:
       fail-fast: false
       matrix:
         ruby_version:
-          - '2.7'
           - '3.2'
     name: "spec (ruby ${{ matrix.ruby_version }})"
     uses: "puppetlabs/cat-github-actions/.github/workflows/gem_ci.yml@main"

.github/workflows/nightly.yml

@@ -11,7 +11,6 @@ jobs:
       fail-fast: false
       matrix:
         ruby_version:
-          - '2.7'
           - '3.2'
     name: "spec (ruby ${{ matrix.ruby_version }})"
     uses: "puppetlabs/cat-github-actions/.github/workflows/gem_ci.yml@main"

.rubocop.yml

@@ -12,7 +12,7 @@ AllCops:
     - vendor/bundle/**/*
   NewCops: enable
   SuggestExtensions: false
-  TargetRubyVersion: '2.7'
+  TargetRubyVersion: '3.1'
 
 # Disabled
 Style/ClassAndModuleChildren:

puppet_litmus.gemspec

@@ -24,7 +24,7 @@ Gem::Specification.new do |spec|
     Providing a simple command line tool for puppet content creators, to enable simple and complex test deployments.
   EOF
   spec.summary = 'Providing a simple command line tool for puppet content creators, to enable simple and complex test deployments.'
-  spec.required_ruby_version = Gem::Requirement.new('>= 2.7.0')
+  spec.required_ruby_version = Gem::Requirement.new('>= 3.1.0')
   spec.add_runtime_dependency 'bolt', '~> 4.0'
   spec.add_runtime_dependency 'docker-api', '>= 1.34', '< 3.0.0'
   spec.add_runtime_dependency 'parallel'