Removed unused scripts/testing files (#1046) #4910

Job	Run time
Build Unsigned Snapshot	2m 2s
Lint	4m 22s
Unit tests with race condition detection	2m 34s
Performance Tests	5m 5s
Unit Tests	2m 15s
Load Tests	4m 46s
Integration Tests - Official OSS Images (bookworm, stable, debian)	6m 40s
Integration Tests (ubuntu, 22.04)	10m 30s
Integration Tests - Official OSS Images (bookworm, mainline, debian)	6m 33s
Integration Tests - Official Plus Images (alpine, 3.20, r32, alpine, /nginx-plus/agent)	6m 22s
Integration Tests (redhatenterprise, 9)	9m 19s
Integration Tests - Official OSS Images (alpine, stable, alpine)	6m 24s
Integration Tests - Official Plus Images (alpine, 3.19, r31, alpine, /nginx-plus/agent)	6m 21s
Integration Tests (alpine, 3.19)	7m 8s
Integration Tests - Official OSS Images (alpine, mainline, alpine)	6m 7s
Integration Tests - Official Plus Images (debian, bookworm, r32, debian, /nginx-plus/agent)	6m 31s
Integration Tests - Official Plus Images (debian, bookworm, r31, debian, /nginx-plus/agent)	6m 38s
Publish NGINX Agent v3 packages / Set workflow variables	8s
Publish NGINX Agent v3 packages / Update Release Draft	7s
Publish NGINX Agent v3 packages / Tag Release	4s
Publish NGINX Agent v3 packages / Upload packages	18m 48s
Publish NGINX Agent v3 packages / Merge release branch back into V3 branch	0s
	1h 58m 44s

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