Fix platform-specific repository names for RHEL 8 variants

Co-authored-by: ramereth <[email protected]>

Author: Copilot

libraries/sql/_connection.rb

@@ -83,10 +83,14 @@ def install_pg_gem
               declare_resource(:package, libpq_package_name) { compile_time(true) }
               declare_resource(:package, 'perl-IPC-Run') do
                 compile_time(true)
-                if platform?('oracle')
+                case node['platform']
+                when 'oracle'
                   options ['--enablerepo=ol8_codeready_builder']
-                else
+                when 'redhat'
                   options('--enablerepo=codeready-builder-for-rhel-8')
+                else
+                  # CentOS Stream, AlmaLinux, Rocky Linux use powertools
+                  options('--enablerepo=powertools')
                 end
               end
             when 9