Change GetProcesses to only return nginx processes & fix get Instances #2966

Job	Run time
Lint	2m 34s
Lint	2m 34s
Unit tests with race condition detection	1m 39s
Unit tests with race condition detection	1m 39s
Build Unsigned Snapshot	56s
Build Unsigned Snapshot	56s
Performance Tests	3m 30s
Performance Tests	2m 37s
Unit Tests	1m 23s
Unit Tests	1m 20s
Generate Profile	3m 58s
Generate Profile	3m 58s
Integration Tests (ubuntu, 22.04)	1m 45s
Integration Tests (ubuntu, 22.04)	1m 45s
Integration Tests (redhatenterprise, 9)	1m 50s
Integration Tests (redhatenterprise, 9)	1m 50s
Integration Tests (alpine, 3.19)	1m 15s
Integration Tests (alpine, 3.19)	1m 15s
	36m 44s

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