Update metric names for Otel conventions #4686

Job	Run time
Performance Tests	4m 29s
Build Unsigned Snapshot	1m 41s
Lint	3m 24s
Unit tests with race condition detection	2m 18s
Unit Tests	1m 42s
Integration Tests - Official OSS Images	0s
Load Tests	0s
Integration Tests	0s
Integration Tests - Official Plus Images	0s
Publish NGINX Agent v3 packages	0s
	13m 34s

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