Update file watcher to only monitor directories referenced in the nginx configuration #5269

Job	Run time
Unit Tests	2m 18s
Lint	4m 27s
Unit tests with race condition detection	2m 44s
Performance Tests	4m 52s
Build Unsigned Snapshot	2m 0s
Integration Tests (redhatenterprise, 9)	8m 57s
Integration Tests - Official OSS Images (alpine, stable, alpine)	7m 33s
Integration Tests (alpine, 3.19)	7m 11s
Integration Tests - Official OSS Images (bookworm, stable, debian)	7m 47s
Integration Tests - Official OSS Images (alpine, mainline, alpine)	7m 29s
Integration Tests - Official OSS Images (bookworm, mainline, debian)	8m 3s
Integration Tests - Official Plus Images (alpine, 3.19, r31, alpine, /nginx-plus/agent)	7m 42s
Integration Tests - Official Plus Images (debian, bookworm, r32, debian, /nginx-plus/agent)	7m 54s
Integration Tests - Official Plus Images (alpine, 3.20, r32, alpine, /nginx-plus/agent)	7m 13s
Load Tests	4m 42s
Integration Tests - Official Plus Images (debian, bookworm, r31, debian, /nginx-plus/agent)	8m 11s
	1h 39m 3s

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