[feat][COM][httpclient] Optimize BML client connection pool parameters and fix datasource client issues

[v-kkhuang]

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Summary

This PR includes the following main changes:

1. BML Client Connection Pool Optimization (linkis-commons/linkis-httpclient)

• Optimized connection pool configuration in AbstractHttpClient.scala
• Set connection pool parameters explicitly via PoolingHttpClientConnectionManager
• Added pending connection count monitoring and logging
• Improved connection management for better performance and reliability

2. DataSource Client Cleanup (linkis-public-enhancements/linkis-pes-client)

• Removed deprecated getPublishedDataSourceByType method
• Simplified LinkisDataSourceRemoteClient interface

3. Other Changes

• Fixed compilation issues across multiple modules
• Updated HBase engineconn plugin resources
• Updated dependencies and build configurations
• Frontend and backend dependency updates

Related Issues

None

Test Plan

• Code compiles successfully
• Unit tests pass
• Integration tests pass

Code Change Details

linkis-commons/linkis-httpclient/src/main/scala/org/apache/linkis/httpclient/AbstractHttpClient.scala

• Added explicit connection pool configuration before building HttpClient
• Moved setMaxTotal and setDefaultMaxPerRoute to connectionManager
• Added pending connection count to connection stats logging

linkis-public-enhancements/linkis-pes-client/src/main/scala/org/apache/linkis/datasource/client/impl/LinkisDataSourceRemoteClient.scala

• Removed getPublishedDataSourceByType method implementation

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