feat(metrics): Support booleans in metric extraction #14723

Job	Run time
Lint	2m 53s
Test (macos-latest)	2m 21s
Lint Rust Default Features	1m 28s
Test (windows-latest)	5m 9s
Test All Features (ubuntu-latest)	3m 58s
Integration Tests	13m 10s
Test Python	58s
Setup build metadata	1s
Build Relay Binary (relay, x86_64-unknown-linux-gnu)	7m 30s
Build Docker Image (relay)	27s
Sentry-Relay Integration Tests	11m 23s
Publish Relay to DockerHub	0s
Upload build artifacts to gocd	0s
Publish Relay to GCR	0s
self-hosted-end-to-end	13m 24s
	1h 2m 42s

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