debug_bundle: fix flaky test

[IoannisRP]

Add a waiting period when trying to get updated metrics.

Backports Required

• [ ] none - not a bug fix
• [ ] none - this is a backport
• [x] none - issue does not exist in previous branches
• [ ] none - papercut/not impactful enough to backport
• [ ] v24.2.x
• [ ] v24.1.x
• [ ] v23.3.x

Release Notes

• none

[vbotbuildovich]

ducktape was retried in https://buildkite.com/redpanda/redpanda/builds/56834#0192a155-370f-43fd-b70a-7b6883b316e8 ducktape was retried in https://buildkite.com/redpanda/redpanda/builds/56911#0192aedc-ad87-4b07-a813-ea43267fd011 ducktape was retried in https://buildkite.com/redpanda/redpanda/builds/56911#0192aee0-f5ca-4477-bb88-a48e821567a5 ducktape was retried in https://buildkite.com/redpanda/redpanda/builds/56911#0192aee0-f5cc-4a56-ac68-9a3690ca3b38 ducktape was retried in https://buildkite.com/redpanda/redpanda/builds/56911#0192aee0-f5ce-4afb-8427-c2a64ce4c498

[vbotbuildovich]

Retry command for Build#56834

please wait until all jobs are finished before running the slash command

/ci-repeat 1
tests/rptest/tests/rpk_cluster_test.py::RpkClusterTest.test_upload_and_query_cluster_license_rpk

[IoannisRP]

Updated commit message

[dotnwat]

Updated commit message

thanks!