Update file watcher to only monitor directories referenced in the nginx configuration #5267

Job	Run time
Lint	4m 45s
Unit Tests	2m 18s
Build Unsigned Snapshot	2m 11s
Unit tests with race condition detection	2m 48s
Performance Tests	5m 10s
Integration Tests (redhatenterprise, 9)	8m 53s
Integration Tests - Official OSS Images (bookworm, mainline, debian)	7m 42s
Integration Tests - Official OSS Images (alpine, mainline, alpine)	7m 20s
Integration Tests - Official OSS Images (alpine, stable, alpine)	7m 24s
Integration Tests - Official Plus Images (debian, bookworm, r32, debian, /nginx-plus/agent)	8m 22s
Integration Tests (alpine, 3.19)	7m 10s
Integration Tests - Official Plus Images (debian, bookworm, r31, debian, /nginx-plus/agent)	7m 38s
Integration Tests - Official Plus Images (alpine, 3.20, r32, alpine, /nginx-plus/agent)	7m 30s
Integration Tests - Official Plus Images (alpine, 3.19, r31, alpine, /nginx-plus/agent)	7m 22s
Integration Tests - Official OSS Images (bookworm, stable, debian)	7m 55s
Load Tests	4m 44s
	1h 39m 12s

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