Prepare Release for identity v1.18.2

[anannya03]

Description

Please add an informative description that covers that changes made by the pull request and link all relevant issues.

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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.

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• Title of the pull request is clear and informative.
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Testing Guidelines

• Pull request includes test coverage for the included changes.

[Copilot]

Pull request overview

This PR prepares the release for azure-identity version 1.18.2, reverting from beta version 1.19.0-beta.2 to a stable patch release. The primary purpose is to remove the Azure Token Proxy feature that was introduced in the beta version and was not ready for stable release.

Changes:

• Reverted version from 1.19.0-beta.2 to 1.18.2 for azure-identity
• Reverted version from 1.2.0-beta.1 to 1.1.19 for azure-identity-broker
• Removed Azure Token Proxy feature code and tests
• Updated CHANGELOG with dependency updates

Reviewed changes

Copilot reviewed 19 out of 22 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
sdk/identity/azure-identity/pom.xml	Version reverted from 1.19.0-beta.2 to 1.18.2
sdk/identity/azure-identity/CHANGELOG.md	Added release notes for 1.18.2, removed beta release sections
sdk/identity/azure-identity/src/main/java/com/azure/identity/WorkloadIdentityCredentialBuilder.java	Removed enableAzureTokenProxy() method and related imports
sdk/identity/azure-identity/src/main/java/com/azure/identity/implementation/customtokenproxy/*.java	Deleted all custom token proxy implementation classes
sdk/identity/azure-identity/src/main/java/com/azure/identity/implementation/SniSslSocketFactory.java	Deleted SNI SSL socket factory implementation
sdk/identity/azure-identity/src/test/java/com/azure/identity/WorkloadIdentityCredentialTest.java	Removed proxy-related tests while keeping core functionality tests
sdk/identity/azure-identity/src/test/java/com/azure/identity/WorkloadIdentityCredentialIdentityBindingTest.java	Deleted entire test file for identity binding with token proxy
sdk/identity/azure-identity/src/test/resources/test-aks-cert*.p12	Deleted test certificate files
sdk/identity/azure-identity-broker/pom.xml	Version reverted from 1.2.0-beta.1 to 1.1.19, azure-identity dependency updated to 1.18.2
sdk/identity/azure-identity-broker-samples/pom.xml	Updated dependencies to non-beta versions
sdk/identity/azure-identity-perf/pom.xml	Updated azure-identity dependency to 1.18.2
sdk/identity/live-test-apps/*/pom.xml	Updated azure-identity dependency references to 1.18.2 in all live test apps
sdk/e2e/pom.xml	Updated azure-identity dependency to 1.18.2
eng/versioning/version_client.txt	Updated version tracking for azure-identity and azure-identity-broker

[Copilot]

The CHANGELOG for version 1.18.2 does not mention the removal of the Azure Token Proxy feature (enableAzureTokenProxy method) that was introduced in 1.19.0-beta.1. Since this PR is reverting from 1.19.0-beta.2 back to a stable release and removing this beta feature, the CHANGELOG should document this removal in the "Other Changes" or "Breaking Changes" section, especially since users who were testing the beta might be affected.