🐛 BUG: RPC Entrypoint Misbehaves with Request Object

### Which Cloudflare product(s) does this pertain to?

Workers Runtime

### What version(s) of the tool(s) are you using?

wrangler 3.57.2

### What version of Node are you using?

v18.18.2

### What operating system and version are you using?

Mac Sonoma 14.2.1

### Describe the Bug

###

**Issue Description:**

I am experiencing issues with a Cloudflare worker that uses an RPC entrypoint. The worker script includes a method `doSomething(request: Request)`, where `request` is a Cloudflare request object.

```typescript
export class RpcEntrypoint extends WorkerEntrypoint {
async doSomething(request: Request) {
return await fn(this.env, request);
}
}
```

In another script, bound to the aforementioned worker script, the method is used as follows:

```typescript
export default {
fetch: async (request: Request, bindings: Bindings, executionContext: ExecutionContext) => {
const s = await env.SERVICE_BINDINGS.doSomething(request);
},
};
```

When passing a request object using service bindings, the worker fails with different errors depending on the type of request.

**Observed Behavior:**

1. **GET Request:**
- Error: `A GET or HEAD cannot have a body`.

2. **POST Request:**
- Error: `A promise rejection was handled asynchronously. This warning occurs when attaching a catch handler to a promise after it rejected. (rejection cloudflare/workers-sdk#1) TypeError: The ReadableStream has been locked to a reader.`

**Expected Behavior:**

The `doSomething` method should handle both GET and POST requests without causing errors.

**Steps to Reproduce:**

1. Set up a Cloudflare worker with the `doSomething` method.
2. Bind another script to the worker.
3. Pass a request object to the `doSomething` method using service bindings.
4. Observe the errors for GET and POST requests.

**Additional Information:**

- Cloudflare Workers version: [wrangler 3.57.2]
- Service Bindings configuration:
```
services = [
{ binding = "SERVICE_BINDINGS", service = "service", entrypoint = "RpcEntrypoint" },
]
```

Any insights or solutions to handle these request types correctly within the worker would be greatly appreciated.

### Please provide a link to a minimal reproduction

_No response_

### Please provide any relevant error logs

A promise rejection was handled asynchronously. This warning occurs when attaching a catch handler to a promise after it rejected. (rejection cloudflare/workers-sdk#1)
TypeError: The ReadableStream has been locked to a reader.
at JsRpcProperty. ()
at file:///Users/bhavinkamani/IdeaProjects/crm-integrations/.wrangler/tmp/dev-kdLmfa/index.js:10790:44
at dispatch (file:///Users/bhavinkamani/IdeaProjects/crm-integrations/.wrangler/tmp/dev-kdLmfa/index.js:314:23)
at file:///Users/bhavinkamani/IdeaProjects/crm-integrations/.wrangler/tmp/dev-kdLmfa/index.js:315:20
at file:///Users/bhavinkamani/IdeaProjects/crm-integrations/.wrangler/tmp/dev-kdLmfa/index.js:1706:11
at async dispatch (file:///Users/bhavinkamani/IdeaProjects/crm-integrations/.wrangler/tmp/dev-kdLmfa/index.js:314:17)
at async file:///Users/bhavinkamani/IdeaProjects/crm-integrations/.wrangler/tmp/dev-kdLmfa/index.js:1706:5
at async dispatch (file:///Users/bhavinkamani/IdeaProjects/crm-integrations/.wrangler/tmp/dev-kdLmfa/index.js:314:17)
at async file:///Users/bhavinkamani/IdeaProjects/crm-integrations/.wrangler/tmp/dev-kdLmfa/index.js:950:25
at async drainBody (file:///Users/bhavinkamani/IdeaProjects/crm-integrations/.wrangler/tmp/dev-kdLmfa/index.js:11029:12) {
stack: TypeError: The ReadableStream has been locked to a…tions/.wrangler/tmp/dev-kdLmfa/index.js:11029:12),
message: The ReadableStream has been locked to a reader.
}

Start with the RPC entrypoint and the JsRpcProperty call path shown in the error trace, then reproduce the service-binding call for both GET and POST requests. Done means a Request object can be passed to doSomething without the GET body or locked ReadableStream errors.

Written by the indexing model from the issue text.