This new change has 2 benefits:
1. It gives the SDK more control on how/when to apply the patches.
2. By applying patches later (usually in app initialization phase), we
   can avoid the conflict between different patching approaches.

The 2 patching approaches are `alias` and `prepend`. When 2 gems patch
the same class in this order, it'll cause "stack level too deep" error:

```
prepend <- sentry-ruby
alias <- gems like scout_apm or rack-mini-profiler
```

After this commit, we can almost be certain that the order would be:

```
alias <- gems like scout_apm or rack-mini-profiler
----
prepend <- sentry-ruby
```

And thus avoid the error.