Add nil pointer check to GenerateMetricsReportBundle #4896

Job	Run time
Lint	39s
Unit Tests	3m 17s
Component Tests	49s
Build unsigned snapshot	4m 3s
Performance Tests	7m 16s
Build Grafana Dashboard Example	1m 4s
Build signed snapshot	6m 43s
Integration Tests (rockylinux, 8)	5m 11s
Integration Tests - Official OSS Images (bookworm, stable, debian)	3m 17s
Integration Tests (rockylinux, 9)	4m 39s
Integration Tests - Official Plus Images (alpine, 3.20, r32, alpine, /nginx-plus/agent)	3m 19s
Integration Tests - Official OSS Images (bookworm, mainline, debian)	3m 19s
Integration Tests (almalinux, 8)	5m 7s
Integration Tests - Official Plus Images (alpine, 3.19, r31, alpine, /nginx-plus/agent)	3m 17s
Integration Tests - Official OSS Images (alpine, stable, alpine)	3m 24s
Integration Tests (almalinux, 9)	4m 29s
Integration Tests - Official Plus Images (debian, bookworm, r32, debian, /nginx-plus/agent)	3m 29s
Integration Tests - Official OSS Images (alpine, mainline, alpine)	3m 5s
Integration Tests (amazonlinux, 2)	5m 51s
Integration Tests - Official Plus Images (debian, bookworm, r31, debian, /nginx-plus/agent)	3m 19s
Integration Tests (amazonlinux, 2023)	4m 59s
Integration Tests (oraclelinux, 8)	6m 17s
Integration Tests (oraclelinux, 9)	5m 18s
Integration Tests (ubuntu, 24.04)	3m 26s
Integration Tests (alpine, 3.17)	2m 56s
Integration Tests (alpine, 3.18)	3m 1s
Integration Tests (alpine, 3.19)	3m 7s
Integration Tests (alpine, 3.20)	2m 58s
Integration Tests (debian, bullseye-slim)	3m 27s
Integration Tests (debian, bookworm-slim)	3m 24s
trigger-release-workflow	0s
	1h 54m 30s

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