REST API: 'Run Request' fails with the error 'Failed to execute 'fetch' on 'Window': Request with GET/HEAD method cannot have body.'

### Version Information

Server Version: Many versions (Tried in v2.6.2, 2.8.4, v2.16.1)

### Environment

Any (Tried in OSS)

### What is the current behaviour?

Trying to run a REST API that has variables that uses the HTTP GET method results in the error -

### What is the expected behaviour?

Clicking 'Run request' should work and the results should be shown.

### How to reproduce the issue?

1. Create and track the table -
```sql
CREATE TABLE author(id SERIAL PRIMARY KEY, name TEXT);
```
2. Track the following query as a REST API
```graphql
query Authors($offset: Int = 0) {
author(limit: 10, offset: $offset) {
id
name
}
}
```

3. Click on the newly created REST

API and click on 'Run request'

### Keywords

REST Run request

No files or tests are named. Reproduce the issue by tracking the provided GraphQL query as a REST API with a GET method, then trace the REST “Run request” flow in the TypeScript code. Done means the request runs successfully and displays results without the GET/HEAD body error.

Written by the indexing model from the issue text.