Fix JsonRpc client side message handling

[sharedRoutine]

For non streamed responses the response is never decoded by the provided RpcSerialization. This is however required for JsonRpc to work. Once we are decoding however, json decoding no longer worked, which is why it needed to be adjusted.

Closes #5670

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: d9e8db3400ad01852f2e6df9c89e86446808e1c9

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 13 packages

Name	Type
@effect/rpc	Patch
@effect/cluster	Patch
@effect/platform-bun	Patch
@effect/platform-node-shared	Patch
@effect/platform-node	Patch
@effect/workflow	Patch
@effect/ai	Patch
@effect/sql-clickhouse	Patch
@effect/ai-amazon-bedrock	Patch
@effect/ai-anthropic	Patch
@effect/ai-google	Patch
@effect/ai-openai	Patch
@effect/ai-openrouter	Patch

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