[RELEASE] React Native SDK v2.9.0

[marco-saia-datadog]

What does this PR do?

Prepares v2.9.0 release.

What's Changed

• [Fix] Lock react-native-webview dependency to 13.14.2 on Example project by @sbarrio in [Fix] Lock react-native-webview dependency to 13.14.2 on Example project #906
• Bump rexml to 3.3.6 on example apps to avoid potential DoS vulnerability by @sbarrio in Bump rexml to 3.3.6 on example apps to avoid potential DoS vulnerability #902
• Bump Android SDK to 2.21.0 and fix android build errors on RN <0.76 by @sbarrio in Bump Android SDK to 2.21.0 and fix android build errors on RN <0.76 #896
• RUM-8382 Introduce Datadog Metro Config for Debug ID injection in RUM Errors by @marco-saia-datadog in [RUM-8382] Introduce Datadog Metro Config for Debug ID injection in RUM Errors #857
• RUM-9615 Copy Debug ID in Hermes composed sourcemaps before upload by @marco-saia-datadog in [RUM-9615] Copy Debug ID in Hermes composed sourcemaps before upload #863
• [FIX] iOS new architecture build error when setting USE_FRAMEWORKS by @marco-saia-datadog in [FIX] iOS new architecture build error when setting USE_FRAMEWORKS #909

Full Changelog: 2.8.2...marcosaia/release-v2.9.0

Documentation PR: DataDog/documentation#30025

[sbarrio]

🎉

[datadog-datadog-prod-us1]

Datadog Report

Branch report: marcosaia/release-v2.9.0
Commit report: cd7de43
Test service: dd-sdk-reactnative

✅ 0 Failed, 680 Passed, 1 Skipped, 4.84s Total Time