Always parse versions from rhn config as strings

[vzhestkov]

What does this PR change?

web.version.uyuni config value is wrongly parsed as float and 2024.10 became 2024.1.

web.version added as well even if it makes no much sense now, but anyway it should be always string as well.

GUI diff

No difference.

Documentation

• No documentation needed: only internal and user invisible changes

Test coverage

• No tests: there are no unit tests for this legacy part of the code

Links

Issue(s): #9414
Port(s): Not needed as Uyuni is the only having such values wrongly parsed as floats

• 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

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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"

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