Change serial number from bytes to string (#944) #4459

Job	Run time
Lint	3m 58s
Unit tests with race condition detection	2m 34s
Build Unsigned Snapshot	1m 44s
Performance Tests	4m 37s
Unit Tests	2m 8s
Integration Tests (ubuntu, 22.04)	8m 2s
Integration Tests - Official Plus Images (alpine, 3.20, r32, alpine, /nginx-plus/agent)	4m 45s
Integration Tests (redhatenterprise, 9)	7m 29s
Load Tests	4m 18s
Integration Tests - Official Plus Images (alpine, 3.19, r31, alpine, /nginx-plus/agent)	4m 50s
Integration Tests - Official OSS Images (bookworm, stable, debian)	5m 5s
Integration Tests (alpine, 3.19)	5m 35s
Integration Tests - Official Plus Images (debian, bookworm, r32, debian, /nginx-plus/agent)	4m 57s
Integration Tests - Official OSS Images (bookworm, mainline, debian)	5m 14s
Integration Tests - Official Plus Images (debian, bookworm, r31, debian, /nginx-plus/agent)	4m 57s
Integration Tests - Official OSS Images (alpine, stable, alpine)	4m 44s
Integration Tests - Official OSS Images (alpine, mainline, alpine)	4m 39s
Publish NGINX Agent v3 packages / Set workflow variables	2s
Publish NGINX Agent v3 packages / Update Release Draft	6s
Publish NGINX Agent v3 packages / Tag Release	3s
Publish NGINX Agent v3 packages / Upload packages	10m 18s
Publish NGINX Agent v3 packages / Merge release branch back into V3 branch	0s
	1h 30m 5s

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