Fix the architecture in case of RHEL-based products

[mackdk]

What does this PR change?

This PR fixes an issue when detecting the products installed on a RHEL-based distribution. This is caused by the wrong handling of the architecture.

Port of https://github.com/SUSE/spacewalk/pull/22339

GUI diff

No difference.

• DONE

Documentation

• No documentation needed: only internal and user invisible changes

• DONE

Test coverage

• No tests: code mostly untestable

• DONE

Links

Fixes https://github.com/SUSE/spacewalk/issues/22314
Tracks https://github.com/SUSE/spacewalk/pull/22339

• DONE

Changelogs

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Re-run a test

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• Re-run test "changelog_test"
• Re-run test "backend_unittests_pgsql"
• Re-run test "java_pgsql_tests"
• Re-run test "schema_migration_test_pgsql"
• Re-run test "susemanager_unittests"
• Re-run test "javascript_lint"
• Re-run test "spacecmd_unittests"

[github-actions]

Suggested tests to cover this Pull Request

• min_deblike_ssh
• min_bootstrap_api
• min_salt_mgrcompat_state
• min_bootstrap_reactivation
• min_salt_minions_page
• proxy_as_pod_basic_tests
• min_deblike_salt
• minssh_bootstrap_api
• min_rhlike_ssh
• sle_ssh_minion
• min_virthost
• min_activationkey
• proxy_retail_pxeboot_and_mass_import
• min_bootstrap_ssh_key
• sle_minion
• min_rhlike_salt
• min_move_from_and_to_proxy
• buildhost_bootstrap
• min_bootstrap_script
• min_ssh_tunnel
• minssh_move_from_and_to_proxy
• proxy_register_as_minion_with_script