Do not ignore ONTIMEOUT pxe in cobbler case

[aaannz]

What does this PR change?

Recent addition of cobbler translations also made cobbler to ignore ONTIMEOUT syslinux entries, like saltboot does because it generates new one. This is not correct in cobbler scenario.

GUI diff

No difference.

• DONE

Documentation

• No documentation needed: only internal and user invisible changes

• DONE

Test coverage

• No tests: covered by integration/acceptance tests

• DONE

Links

Issue(s): # https://github.com/SUSE/spacewalk/issues/24249
Port(s): # add downstream PR(s), if any

• DONE

Changelogs

Make sure the changelogs entries you are adding are compliant with https://github.com/uyuni-project/uyuni/wiki/Contributing#changelogs and https://github.com/uyuni-project/uyuni/wiki/Contributing#uyuni-projectuyuni-repository

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• No changelog needed

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Re-run a test

If you need to re-run a test, please mark the related checkbox, it will be unchecked automatically once it has re-run:

• 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"

Before you merge

Check How to branch and merge properly!

[avshiliaev]

Issue

• https://github.com/SUSE/spacewalk/issues/24249

[agraul]

I trust you that the semantics are right 😃, LGTM 🚀