Use bolt_supported beaker helper

Use new bolt_supported helper to conditionally setup and run
beaker tests.

Since bolt is available for RHEL9 at the time of writing this will
enable bolt tests for RHEL9.

spec/acceptance/redis_cli_task_spec.rb

@@ -9,7 +9,7 @@
 
   let(:task_name) { 'redis::redis_cli' }
 
-  unless fact('os.family') == 'RedHat' && fact('os.release.major').to_i >= 9
+  if bolt_supported?
     include_examples 'an idempotent resource' do
       let(:manifest) { 'include redis' }
     end

spec/spec_helper_acceptance.rb

@@ -6,11 +6,7 @@
   # sysctl is untestable in docker
   install_puppet_module_via_pmt_on(host, 'puppet-augeasproviders_sysctl') unless host['hypervisor'] == 'docker'
 
-  unless fact_on(host, 'os.family') == 'RedHat' && fact_on(host, 'os.release.major').to_i >= 9
-    # puppet-bolt rpm for CentOS 9 is not yet available
-    # https://tickets.puppetlabs.com/browse/MODULES-11275
-    host.install_package('puppet-bolt')
-  end
+  host.install_package('puppet-bolt') if bolt_supported?(host)
 
   if fact_on(host, 'os.family') == 'Debian'
     # APT required for Debian based systems where `$redis::manage_repo` is `true`