Rename enableAzureTokenProxy -> enableAzureProxy

[anannya03]

Description

The WorkloadIdentityCredential option for enabling the Azure Kubernetes proxy feature has inconsistent naming across Azure SDK languages. This PR aligns the Java SDK with other languages by renaming the option from enableAzureTokenProxy to enableAzureProxy.

[github-actions]

API Change Check

APIView identified API level changes in this PR and created the following API reviews

com.azure:azure-identity

[Copilot]

Pull request overview

This PR renames the enableAzureTokenProxy() method to enableAzureProxy() in the WorkloadIdentityCredentialBuilder class to align with naming conventions used across other Azure SDK languages. This is a breaking change that only affects code written against beta version 1.19.0-beta.1.

Changes:

• Renamed the enableAzureTokenProxy() method to enableAzureProxy() in the builder class
• Updated the internal field from enableTokenProxy to enableAzureProxy
• Updated all test references to use the new method name
• Documented the breaking change in CHANGELOG.md

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
sdk/identity/azure-identity/src/main/java/com/azure/identity/WorkloadIdentityCredentialBuilder.java	Renamed method from enableAzureTokenProxy() to enableAzureProxy() and updated internal field name and JavaDoc
sdk/identity/azure-identity/src/test/java/com/azure/identity/WorkloadIdentityCredentialTest.java	Updated 11 test method calls to use the new enableAzureProxy() method
sdk/identity/azure-identity/src/test/java/com/azure/identity/WorkloadIdentityCredentialIdentityBindingTest.java	Updated 13 test method calls to use the new enableAzureProxy() method
sdk/identity/azure-identity/CHANGELOG.md	Added breaking change entry documenting the method rename for version 1.19.0-beta.2

[scottaddie]

@chlowell Is there anything related to identity bindings that's worth adding to the TSG section at https://github.com/Azure/azure-sdk-for-java/blob/main/sdk/identity/azure-identity/TROUBLESHOOTING.md#troubleshoot-workloadidentitycredential-authentication-issues?

[chlowell]

Great question! We should document the errors devs can see when they try to use identity bindings without enabling the proxy mode: Azure/azure-sdk-for-go#25908