Upgrade GCP-BOM to 26.49.0

[Abacn]

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[Abacn]

Many zetasql nexmark tests fails with

com.google.zetasql.io.grpc.StatusRuntimeException: UNKNOWN
	at com.google.zetasql.io.grpc.stub.ClientCalls.toStatusRuntimeException(ClientCalls.java:262)
	at com.google.zetasql.io.grpc.stub.ClientCalls.getUnchecked(ClientCalls.java:243)
	at com.google.zetasql.io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:156)
	at com.google.zetasql.ZetaSqlLocalServiceGrpc$ZetaSqlLocalServiceBlockingStub.getLanguageOptions(ZetaSqlLocalServiceGrpc.java:1562)
...
Caused by: java.lang.UnsupportedOperationException
	at com.google.zetasql.io.grpc.netty.AbstractHttp2Headers.iterator(AbstractHttp2Headers.java:500)
	at io.netty.handler.codec.http2.DefaultHttp2ConnectionDecoder$FrameReadListener.onHeadersRead(DefaultHttp2ConnectionDecoder.java:423)

due to netty_version bumped from "4.1.100.Final" to "4.1.110.Final", not compatible with zetasql "2022.04.1" shaded netty version

Similar to https://github.com/grpc/grpc-java/issues/10707

[Abacn]

as of the latest version of zetasql-client: https://mvnrepository.com/artifact/com.google.zetasql/zetasql-client/2024.08.2

it still shades grpc-1.56.0 and io.netty 4.1.87.Final (last updated: 2023.08.1)

[Abacn]

testCommit_handlesFailedCommits (org.apache.beam.runners.dataflow.worker.windmill.client.commits.StreamingEngineWorkCommitterTest) failed


expected to contain: CompleteCommit{computationId=computationId-10, shardedKey=0000000000000002, workId=WorkId{cacheToken=1, workToken=10}, status=ABORTED}
but was            : [CompleteCommit{computationId=computationId-6, shardedKey=0000000000000002, ...

not related to this change. Same test passed the first attempt run (where other irrelevant test failed)

[Abacn]

R: @damccorm

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