[Bug]: Deploying a project with no HTTP endpoints results in ISOLATE_INTERNAL_FAILURE

### Problem description

Attempting to deploy a project with no HTTP endpoints fails with the error:

`{"type":"error","code":"deploymentFailed","ctx":"The deployment failed: ISOLATE_INTERNAL_FAILURE"}`

Given that this error can be triggered by
`
// Deno.serve(() => new Response("Hello, world!"));
console.log("no chance")
`

whilst the following works fine

`
Deno.serve(() => new Response("Hello, world!"));
console.log("this works now")
`
it would appear that the error is in some way due to the lack of a HTTP endpoint.

There are quite a few scenarios in which it would be handy to use Deno's cron api on deploy without serving anything e.g. to interact with a Telegram bot.

### Steps to reproduce

1. create a project with entrypoint contents `console.log("foo")`
2. attempt to deploy

### Expected behavior

The project should deploy succesfully.

### Environment

_No response_

### Possible solution

_No response_

### Additional context

_No response_

Start with a Deno Deploy project whose entrypoint is `console.log("foo")` and attempt deployment; compare it with the `Deno.serve` example. Done is a successful deployment for a project with no HTTP endpoints, while deployment with an HTTP endpoint continues to work.

Written by the indexing model from the issue text.