Remove GraalVM Reachability Metadata and nativeTest related to Etcd's Cluster mode integration

[linghengqian]

Fixes #36672 .

Changes proposed in this pull request:

• Remove GraalVM Reachability Metadata and nativeTest related to Etcd's Cluster mode integration. Maintaining GraalVM Reachability Metadata in etcd mode separately under Windows would require introducing the devcontainer of a Linux container, which is too troublesome. [Native Image] Netty DNS Resolver is not available in GraalVM Native Image compiled on Windows oracle/graal#11280 prevents the Windows development experience.
• Remove duplicate dependencies from the test module until the JDBC and Proxy nativeTest are finally separated into different Maven modules.
• Change the name of the folder storing test metadata to shardingsphere-test-native, which corresponds to the Maven module name, helps to eliminate misunderstandings.

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• I have made corresponding changes to the documentation.
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• I have updated the Release Notes of the current development version. For more details, see Update Release Note

[Copilot]

Pull request overview

This PR removes GraalVM Reachability Metadata and nativeTest support for Etcd's Cluster mode integration due to compatibility issues with Windows 11 (oracle/graal#11280) and conflicts with the GraalVM Tracing Agent. The changes streamline the native test module and clarify documentation about Etcd support limitations.

• Removes all Etcd-related test infrastructure and metadata
• Cleans up duplicate dependencies from the test module's pom.xml
• Updates documentation to reflect the removal and provide guidance for developers who need Etcd cluster mode support

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
test/native/src/test/java/org/apache/shardingsphere/test/natived/jdbc/modes/cluster/EtcdTest.java	Removes the EtcdTest class that was testing cluster mode with Etcd
test/native/src/test/resources/test-native/yaml/jdbc/modes/cluster/etcd.yaml	Removes the Etcd cluster configuration YAML file used by tests
test/native/src/test/resources/META-INF/native-image/shardingsphere-test-native/reachability-metadata.json	Removes the GraalVM reachability metadata entry for EtcdTest
infra/reachability-metadata/src/main/resources/META-INF/native-image/org.apache.shardingsphere/generated-reachability-metadata/reachability-metadata.json	Removes all Etcd-related GraalVM reachability metadata entries and updates condition typeReached references
test/native/pom.xml	Removes duplicate dependencies (shardingsphere-jdbc, various database drivers, jetcd-test, and others) that are already transitively included
docs/document/content/user-manual/shardingsphere-jdbc/graalvm-native-image/development/_index.en.md	Updates documentation to remove reference to EtcdTest Windows limitation and corrects metadata folder path
docs/document/content/user-manual/shardingsphere-jdbc/graalvm-native-image/development/_index.cn.md	Updates Chinese documentation to remove reference to EtcdTest Windows limitation and corrects metadata folder path
docs/document/content/user-manual/shardingsphere-jdbc/graalvm-native-image/_index.en.md	Adds new limitation documentation explaining Etcd cluster mode is unavailable on Windows 11 and conflicts with GraalVM Tracing Agent
docs/document/content/user-manual/shardingsphere-jdbc/graalvm-native-image/_index.cn.md	Adds Chinese version of the new limitation documentation for Etcd cluster mode

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