Clear biometric auth cache when removing profiles

[KaannKara]

Summary

• clear saved keychain auth credentials after a profile is removed
• prevents restoring the same key-uid from reusing a stale biometric auth method
• add unit coverage for the profile-removal success path

Fixes #21842

Testing

• git diff --check
• JAVA_HOME=/opt/homebrew/opt/openjdk@17/libexec/openjdk.jdk/Contents/Home SHADOW_NS_REGEXP='^status-im.contexts.onboarding.events-test$' SHADOW_OUTPUT_TO=target/onboarding_events_test/test.js TARGET=clojure corepack yarn shadow-cljs compile mocks && corepack yarn shadow-cljs compile test
• node --require ./test-resources/override.js target/onboarding_events_test/test.js (blocked locally: missing lib/binding/status_nodejs_addon.node; requires status-go-library/native binding)
• make test-unit (blocked locally: status-go-library Nix setup failed at sha256sum on macOS)