Update package source to meet tito requirement

[sbluhm]

What does this PR change?

Tito requires to list the package source as %{name}-%{version}.tar.gz
If an existing source is set, tito downloads the package instead of using the git structure. This stops the package from building on Fedora Copr (the download has a different folder structure).

(see Tito man page at https://github.com/rpm-software-management/tito/blob/9fd0c5a2c7c801f3186a0d7c836ed7278fdcff0c/tito.8.asciidoc?plain=1#L55)

GUI diff

No difference.

• DONE

Documentation

• No documentation needed: only internal and user invisible changes

• DONE

Test coverage

• No tests: already covered

Build manually tested on copr epel-9-x86_64.

• DONE

Links

Fixes #
Tracks # add downstream PR, 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

If you don't need a changelog check, please mark this checkbox:

• No changelog needed

If you uncheck the checkbox after the PR is created, you will need to re-run changelog_test (see below)

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"

[sbluhm]

@cbbayburt , can you please review this one? Would love to have it in before the next release. Big thanks!

[cbbayburt]

Thanks, @sbluhm. LGTM 👍

Let's get a release engineer to have a look as well.
Meanwhile, please rebase your branch so the tests run again.

[sbluhm]

@deneb-alpha, can you please review this one? Would love to have it in before the next release. Big thanks!

[mcalmer]

@raulillo82 maybe you can also have a look

[deneb-alpha]

LGTM,thanks