Add read only file plugin #5260

Job	Run time
Unit tests with race condition detection	2m 41s
Lint	4m 29s
Build Unsigned Snapshot	2m 3s
Performance Tests	4m 54s
Unit Tests	2m 25s
Integration Tests (redhatenterprise, 9)	8m 57s
Integration Tests - Official OSS Images (alpine, stable, alpine)	7m 18s
Integration Tests - Official OSS Images (bookworm, mainline, debian)	7m 31s
Integration Tests - Official OSS Images (bookworm, stable, debian)	7m 34s
Integration Tests - Official Plus Images (alpine, 3.19, r31, alpine, /nginx-plus/agent)	7m 22s
Load Tests	4m 31s
Integration Tests (alpine, 3.19)	6m 50s
Integration Tests - Official Plus Images (debian, bookworm, r31, debian, /nginx-plus/agent)	7m 40s
Integration Tests - Official OSS Images (alpine, mainline, alpine)	7m 12s
Integration Tests - Official Plus Images (alpine, 3.20, r32, alpine, /nginx-plus/agent)	7m 12s
Integration Tests - Official Plus Images (debian, bookworm, r32, debian, /nginx-plus/agent)	8m 16s
	1h 36m 55s

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