Fix spacecmd type issue during bootstrap

[m-czernek]

What does this PR change?

When executing system bootstrap with specified port number, e.g. system_bootstrap -H suma-new-minion -p 22 -u root -P linux -a 1-sles15-sp5-ssh, the port number is a string. However, SystemHandler expects this to be an int.

GUI diff

No difference.

• DONE

Documentation

• No documentation needed: only internal and user invisible changes

• DONE

Links

Issue(s): https://github.com/SUSE/spacewalk/issues/25093
Port(s):

• https://github.com/SUSE/spacewalk/pull/25176

• https://github.com/SUSE/spacewalk/pull/25178

• 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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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"

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