Fix default HTTPS protocol to use HttpsSegmentFetcher

[ilamhs]

The default segment fetcher for HTTPS protocol incorrectly returns HttpSegmentFetcher instead of HttpsSegmentFetcher. This means SSL configuration options in HttpsSegmentFetcher (including the renewable SSL context added in #17315) are never used for default HTTPS fetches.

This change:

• Adds a dedicated HTTPS_SEGMENT_FETCHER instance
• Initializes it alongside other default fetchers
• Returns it for HTTPS protocol in getSegmentFetcher()
• Updates javadoc and test to reflect correct behavior

Instructions:

1. The PR has to be tagged with at least one of the following labels (*):
   1. feature
   2. bugfix
   3. performance
   4. ui
   5. backward-incompat
   6. release-notes (**)
2. Remove these instructions before publishing the PR.

(*) Other labels to consider:

• testing
• dependencies
• docker
• kubernetes
• observability
• security
• code-style
• extension-point
• refactor
• cleanup

(**) Use release-notes label for scenarios like:

• New configuration options
• Deprecation of configurations
• Signature changes to public methods/interfaces
• New plugins added or old plugins removed

[AlexanderKM]

Thanks!

[codecov-commenter]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
10804	1	10803	45

View the top 3 failed test(s) by shortest run time

org.apache.pinot.controller.helix.core.minion.PinotTaskManagerDistributedLockingTest::testForceReleaseLockDuringTaskExecution

Stack Traces | 18.5s run time

Both createTask calls should have generated tasks expected [2] but found [3]

org.apache.pinot.controller.helix.core.minion.PinotTaskManagerDistributedLockingTest::testForceReleaseLockDuringTaskExecution

Stack Traces | 20.8s run time

Both createTask calls should have generated tasks expected [2] but found [3]

org.apache.pinot.integration.tests.TlsIntegrationTest::testRealtimeSegmentUploadDownload

Stack Traces | 30.4s run time

Failed to return result in 30000ms

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[ilamhs]

Verified that the tests failures are independent of this PR.