HDDS-15265. Speed up TestStorageDistributionEndpoint testcases

[priyeshkaratha]

What changes were proposed in this pull request?

This pull request synchronizes the creation of BlockDeletingServiceMetrics and optimizes integration tests for the Recon storage distribution endpoint by reducing block deletion intervals and adjusting wait times.

What is the link to the Apache JIRA

HDDS-15265

How was this patch tested?

Tested using CI - https://github.com/priyeshkaratha/ozone/actions/runs/26841456183

Execution time reduced to

[INFO] Running org.apache.hadoop.ozone.recon.TestStorageDistributionEndpointEC
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 67.64 s -- in org.apache.hadoop.ozone.recon.TestStorageDistributionEndpointEC
[INFO] Running org.apache.hadoop.ozone.recon.TestStorageDistributionEndpointRatis
[INFO] Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 65.61 s -- in org.apache.hadoop.ozone.recon.TestStorageDistributionEndpointRatis

[adoroszlai]

Thanks @priyeshkaratha for the patch.