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

[AlexanderKM]

Thanks!

[codecov-commenter]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
12303	1	12302	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.

[Jackie-Jiang]

I think the test failure is introduced by this PR. Please take another look:

2026-02-27T01:58:47.1087655Z [ERROR] Failures: 
2026-02-27T01:58:47.1089449Z [ERROR]   TlsIntegrationTest.testRealtimeSegmentUploadDownload:485 » IllegalState Failed to return result in 30000ms