Bug when bundling commonjs when there is code before super()

I encountered a bug where I get a bug under very specific circumstances:

- Only applies to CJS
- when minify is enabled
- when spliting is enabled
- when there is code before and after calling `super()` in the constructor
- when there is a field that is initialized on declaration (and not in the constructor)

**Source**

````ts
// src/index.ts
class Parent {
constructor() {}
}

class Feature {
constructor() {}
}

export class Child extends Parent {
feature = new Feature();

constructor() {
console.log("before");

super();

console.log("after");
}
}
````

**Result**

````js
constructor(){console.log("before"),super();_class.prototype.__init.call(this);,console.log("after")}
^
````

**Error (when using the built code)**

````txt
SyntaxError: Unexpected token ','
````

**Reproduction**

- Download and unpack [super-bug.zip](https://github.com/egoist/tsup/files/15313304/super-bug.zip)
- pnpm install
- pnpm run build
- Open dist/index.js

**Context**

I found this bug while working on https://github.com/faker-js/faker/pull/2838

- https://github.com/faker-js/faker/pull/2838