ci: Temporarily enable verbose mode for cirrus-run

ci: Temporarily enable verbose mode for cirrus-run

We've hit issues with GitLab CI jobs reporting a failure despite
the corresponding Cirrus CI job finishing successfully: this is
apparently caused by the underlying VM being rescheduled.

A workaround for this issue has been implemented as of

  https://github.com/sio/cirrus-run/commit/5299874bbb71a84bec7476d9d0ca4ba49bb7ed97

which will be included in the upcoming 0.3.0 release; however, in
order to validate that this workaround is effective it would be
useful to have more data.

Based on the conversation in

  https://github.com/sio/cirrus-run/issues/4

enabling verbose mode allows to collect this data while not having
any impact on performance, so let's enable it temporarily and then
disable it again once cirrus-run 0.3.0 is out.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>