fix: add this type for Reflect.defineProperty

[hanzhangyu]

Example

var A: {a?: number, b: number} = {b:2}
Reflect.defineProperty(A, 'a', {
  // set(this: any, value: any) { // to fix
  set(value: any) {
    console.log(this.b); // Property 'b' does not exist on type 'PropertyDescriptor'.
  },
  enumerable: true,
  configurable: true
});
A.a = 1;

Fixes

#33542

[RyanCavanaugh]

This is not a good fix - just setting this to any is basically introducing an implicit any into the snippet.

[RyanCavanaugh]

Author pointed out that this: any is exactly what we do for Object.defineProperty, so at worse this is simply consistent with that

[typescript-bot]

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