fix: KafkaBoundedSupervisorTest flaky test

[Shekharrajak]

Fixes #19542 .

Description

embedded-tests: allow per-call timeout for ingestion wait, bump KafkaBoundedSupervisorTest to 120s

The bounded
supervisor cold-start pipeline (post supervisor -> schedule task ->
assign partitions -> consume from Kafka -> publish -> COMPLETED) can
exceed the cluster default 60s on a cold CI runner.

Release note

This PR has:

• been self-reviewed.
  • using the concurrency checklist (Remove this item if the PR doesn't have any relation to concurrency.)
• added documentation for new or modified features or behaviors.
• a release note entry in the PR description.
• added Javadocs for most classes and all non-trivial methods. Linked related entities via Javadoc links.
• added or updated version, license, or notice information in licenses.yaml
• added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader.
• added unit tests or modified existing tests to cover new code paths, ensuring the threshold for code coverage is met.
• added integration tests.
• been tested in a test Druid cluster.

[FrankChen021]

I have reviewed the code for correctness, edge cases, concurrency, and integration risks; no issues found.

Reviewed 3 of 3 changed files.

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This is an automated review by Codex GPT-5.5

[Shekharrajak]

@jtuglu1 , please have a look - this flaky tests occurring here #19266