Add metrics to export netty direct memory used and max (#11575) #21205

Job	Run time
Pinot Integration Test Set 1 (temurin-11)	50m 11s
Pinot Compatibility Regression Testing against release-0.12.1 on compatibility-verifier/sample-test-suite	42m 26s
Pinot Integration Test Set 1 (temurin-17)	52m 0s
Pinot Compatibility Regression Testing against release-1.0.0 on compatibility-verifier/sample-test-suite	43m 59s
Pinot Integration Test Set 1 (temurin-20)	50m 19s
Pinot Compatibility Regression Testing against master on compatibility-verifier/sample-test-suite	1m 25s
Pinot Quickstart on JDK 11	23m 56s
Pinot Quickstart on JDK 17	20m 33s
Pinot Quickstart on JDK 20	20m 34s
Pinot Integration Test Set 2 (temurin-11)	50m 6s
Pinot Integration Test Set 2 (temurin-17)	56m 43s
Pinot Linter Test Set	1m 54s
Pinot Integration Test Set 2 (temurin-20)	45m 1s
Pinot Unit Test Set 1 (temurin-11)	54m 38s
Pinot Unit Test Set 1 (temurin-17)	53m 57s
Pinot Unit Test Set 1 (temurin-20)	1h 2m 21s
Pinot Unit Test Set 2 (temurin-11)	39m 47s
Pinot Unit Test Set 2 (temurin-17)	48m 13s
Pinot Unit Test Set 2 (temurin-20)	39m 23s
	12h 37m 26s

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