Check if NGINX reload is complete #5581

Job	Run time
Lint	7m 43s
Proxy Sanity Check	2m 7s
Unit tests with race condition detection	19m 36s
Unit Tests	4m 25s
Build Unsigned Snapshot	3m 12s
Performance Tests	8m 18s
Integration Tests - Official Plus Images (alpine, 3.20, r32, alpine, /nginx-plus/agent)	6m 34s
Integration Tests (ubuntu, 24.04)	6m 33s
Load Tests	5m 3s
Integration Tests - Official OSS Images (alpine, stable, alpine)	5m 57s
Integration Tests - Official Plus Images (debian, bookworm, r32, debian, /nginx-plus/agent)	6m 35s
Integration Tests - Official OSS Images (bookworm, stable, debian)	6m 0s
Integration Tests - Official Plus Images (debian, bookworm, r31, debian, /nginx-plus/agent)	6m 20s
Integration Tests (alpine, 3.22)	5m 53s
Integration Tests (redhatenterprise, 9)	7m 27s
Integration Tests - Official OSS Images (alpine, mainline, alpine)	5m 58s
Integration Tests - Official Plus Images (alpine, 3.19, r31, alpine, /nginx-plus/agent)	5m 59s
Integration Tests - Official OSS Images (bookworm, mainline, debian)	6m 15s
	1h 59m 55s

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