[ Reason ]
Disable two flaky tests. Closes: #1102312 (FTBFS bug).

[ Impact ]
The package does not always build from source.

[ Tests ]
I've checked that the package builds ok on the systems where it used to fail.

[ Risks ]
Very low. No real code changes, we are just disabling two tests.

[ Checklist ]
   [X] *all* changes are documented in the d/changelog
   [X] I reviewed all changes and I approve them
   [X] attach debdiff against the package in (old)stable
   [X] the issue is verified as fixed in unstable

[ Changes ]
Disable two flaky tests.

[ Other info ]
The change is quite trivial, so I've already uploaded the package.

Hi.

Note: I've just noticed that this package has a CVE and trixie is
affected, but I've checked and the patch does not apply cleanly.

Therefore, I suggest that the proposed update is accepted as is,
and we can see later if we are able to make another upload +deb13u2 on
top of it or not.

Thanks.