Tests

Add Etna P-chain metrics #8902

Job	Run time
Run bootstrap monitor e2e tests	7m 2s
Up-to-date protobuf	31s
Up-to-date mocks	2m 8s
Protobuf Lint	5s
e2e_existing_network	3m 22s
e2e_post_etna	12m 26s
e2e_pre_etna	12m 16s
Fuzz	12m 41s
Up-to-date go.mod and go.sum	19s
Lint	4m 2s
Build Antithesis avalanchego images	7m 58s
Build Antithesis xsvm images	10m 55s
Image build	6s
Unit (macos-12)	10m 12s
Upgrade	3m 32s
Unit (ubuntu-20.04)	4m 47s
Unit (ubuntu-22.04)	7m 31s
Unit (ubuntu-24.04)	4m 37s
Unit (windows-2022)	12m 38s
Unit (custom-arm64-jammy)	12m 36s
Unit (custom-arm64-noble)	12m 35s
	2h 22m 19s

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