Upgrade Netty and Reactor patch versions

[alzimmermsft]

Description

Upgrades Netty and Reactor dependencies to the latest patch versions of the minor versions we use.

All SDK Contribution checklist:

• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.

General Guidelines and Best Practices

• Title of the pull request is clear and informative.
• There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, see this page.

Testing Guidelines

• Pull request includes test coverage for the included changes.

[Copilot]

Pull request overview

This PR upgrades patch versions of Netty and Reactor dependencies to address potential bug fixes and improvements in those libraries. The upgrade maintains compatibility by staying within the same minor version families (Netty 4.1.x, Reactor 3.7.x, Reactor Netty 1.2.x).

• Netty upgraded from 4.1.127.Final to 4.1.130.Final
• Reactor Core upgraded from 3.7.11 to 3.7.14
• Reactor Netty HTTP upgraded from 1.2.10 to 1.2.13

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
eng/versioning/external_dependencies.txt	Central dependency version registry updated with new Netty and Reactor versions
sdk/core/azure-core/pom.xml	Updated reactor-core dependency version and bannedDependencies configuration
sdk/core/azure-core-version-tests/pom.xml	Updated reactor-core dependency version and bannedDependencies configuration
sdk/core/azure-core-http-netty/pom.xml	Updated all Netty dependencies, reactor-netty-http, and bannedDependencies configuration
sdk/clientcore/http-netty4/pom.xml	Updated all Netty dependencies and bannedDependencies configuration
sdk/webpubsub/azure-messaging-webpubsub-client/pom.xml	Updated netty-codec-http dependency and bannedDependencies configuration
sdk/openai/azure-ai-openai-realtime/pom.xml	Updated netty-codec-http dependency and bannedDependencies configuration
sdk/eventhubs/azure-messaging-eventhubs/docs/pom.xml	Updated reactor-core dependency version
common/perf-test-core/pom.xml	Updated reactor-core version in bannedDependencies configuration