Bump actions/setup-go from 5.0.0 to 5.5.0 #5715

Job	Run time
Proxy Sanity Check	14s
Lint	3m 55s
Unit tests with race condition detection	5m 39s
Performance Tests	8m 37s
Unit Tests	5m 24s
Build Unsigned Snapshot	3m 43s
Integration Tests - Official OSS Images (bookworm, stable, debian)	6m 18s
Integration Tests (ubuntu, 24.04)	4m 48s
Integration Tests - Official OSS Images (alpine, stable, alpine)	5m 55s
Integration Tests (redhatenterprise, 9)	4m 44s
Integration Tests - Official OSS Images (bookworm, mainline, debian)	6m 10s
Integration Tests - Official Plus Images (alpine, 3.19, r31, alpine, /nginx-plus/agent)	23s
Integration Tests - Official Plus Images (alpine, 3.20, r32, alpine, /nginx-plus/agent)	26s
Integration Tests (alpine, 3.22)	4m 32s
Integration Tests - Official OSS Images (alpine, mainline, alpine)	6m 1s
Integration Tests - Official Plus Images (debian, bookworm, r32, debian, /nginx-plus/agent)	22s
Integration Tests - Official Plus Images (debian, bookworm, r31, debian, /nginx-plus/agent)	22s
Load Tests	46s
	1h 8m 19s

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