Add token file watcher #4658

Job	Run time
Lint	4m 12s
Build Unsigned Snapshot	1m 55s
Unit tests with race condition detection	2m 27s
Unit Tests	2m 3s
Performance Tests	4m 55s
Integration Tests - Official Plus Images (alpine, 3.20, r32, alpine, /nginx-plus/agent)	5m 32s
Integration Tests - Official OSS Images (bookworm, stable, debian)	6m 11s
Integration Tests - Official Plus Images (alpine, 3.19, r31, alpine, /nginx-plus/agent)	5m 42s
Load Tests	4m 19s
Integration Tests (ubuntu, 22.04)	9m 16s
Integration Tests - Official Plus Images (debian, bookworm, r32, debian, /nginx-plus/agent)	5m 48s
Integration Tests - Official Plus Images (debian, bookworm, r31, debian, /nginx-plus/agent)	6m 3s
Integration Tests (redhatenterprise, 9)	8m 34s
Integration Tests - Official OSS Images (bookworm, mainline, debian)	5m 51s
Integration Tests (alpine, 3.19)	6m 27s
Integration Tests - Official OSS Images (alpine, stable, alpine)	5m 45s
Integration Tests - Official OSS Images (alpine, mainline, alpine)	6m 13s
Publish NGINX Agent v3 packages	0s
	1h 31m 13s

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