remove pubsublite from java sdk

[derrickaw]

part 5 - #37375

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[gemini-code-assist]

Summary of Changes

Hello @derrickaw, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request represents the fifth part of a comprehensive effort to remove all Google Cloud Pub/Sub Lite integration from the Apache Beam Java SDK. The changes involve a thorough cleanup of the codebase, including the removal of all related dependencies, source files, and configurations across the Dataflow runner, SQL extensions, and the core GCP I/O module. This systematic removal aims to streamline the SDK by eliminating deprecated components and their associated overhead.

Highlights

• Dependency Removal: Eliminated all Google Cloud Pub/Sub Lite client, gRPC, and protobuf dependencies from the Dataflow runner, SQL extensions, and the core GCP I/O module. This includes removing the everit_json_schema dependency which was specifically used for Pub/Sub Lite SchemaTransform tests.
• Codebase Cleanup: Removed a significant amount of Pub/Sub Lite specific source code files across various modules, including the entire org.apache.beam.sdk.io.gcp.pubsublite and org.apache.beam.sdk.extensions.sql.meta.provider.pubsublite packages and their internal utilities.
• SQL Extension Integration Removal: Removed the Pub/Sub Lite table provider, subscription table, topic table, and row handler components from the Beam SQL extensions, along with their associated test files.
• Dataflow Runner Overrides Removal: Removed the SubscribeTransform override for Pub/Sub Lite from the Dataflow runner, ensuring no Pub/Sub Lite specific transforms are applied.
• API Surface Test Update: Updated the GCP API surface test to no longer include com.google.cloud.pubsublite classes, reflecting the complete removal of the library.

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R: @chamikaramj for label java.

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[Abacn]

Thanks!