fix(firestore): handle parent correctly in doc and collection

[ycmjason]

Description

Previously, doc() and collection() assumed parent to be a Collection and Document respectively.

But I belive this is not the indended behaviour as we provided the overload for them to take in Collection | Document. See here.

This commit adds support to this.

Related issues

N/A

Release Summary

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
  • Yes
• My change supports the following platforms;
  • Android
  • iOS
• My change includes tests;
  • e2e tests added or updated in packages/\*\*/e2e
  • jest tests added or updated in packages/\*\*/__tests__
• I have updated TypeScript types that are affected by my change.
• This is a breaking change;
  • Yes
  • No

Test Plan

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Name	Status	Preview	Comments	Updated (UTC)
react-native-firebase	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 14, 2024 10:02am

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[russellwheatley]

Hi @ycmjason , could you be explicit about what the issue is. i.e. code sample with expected behaviour + actual behaviour.

So I can understand the issue this is trying to solve. Would also be helpful to add e2e tests to test behaviour if it is indeed a bug.