ref(ua): Bump uap-core to v0.18.0 #15040

Job	Run time
Lint Rust Default Features	1m 29s
Lint	3m 13s
Setup build metadata	1s
Test All Features (ubuntu-latest)	3m 21s
Test (macos-latest)	2m 26s
Integration Tests	12m 58s
Test Python	59s
Test (windows-latest)	5m 48s
Build Relay Binary (relay, x86_64-unknown-linux-gnu)	7m 45s
Build Docker Image (relay)	49s
Sentry-Relay Integration Tests	11m 18s
Publish Relay to DockerHub	0s
self-hosted-end-to-end	13m 15s
Publish Relay to GCR	0s
Upload build artifacts to gocd	0s
	1h 3m 22s

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