Purchases.getOfferings() performance issue

• I have updated Purchases SDK to the latest version
• I have read the Contribution Guidelines
• I have searched the Community
• I have read docs.revenuecat.com
• I have searched for existing Github issues

Describe the bug
On IOS devices calling Purchases.getOfferings() is extremely slow. For exemple it takes up to 10 seconds on the Iphone 14 I have under my eyes. At least when called for the first time.

1. Environment

   1. Platform: IOS
   2. SDK version: 7.1.0
   3. OS version: 16.4
   4. Xcode/Android Studio version: 14.3
   5. React Native version: 0.72.6
   6. SDK installation (CocoaPods + version or manual): CocoaPods ~> 1.13

2. Debug logs that reproduce the issue

   Not relevant

3. Steps to reproduce, with a description of expected vs. actual behavior

const startTs = Date.now();
const offerings = await Purchases.getOfferings();
const endTs = Date.now();
console.log(`⏰ Revenue Cat: getOfferings took ${endTs - startTs}ms`);
// output: ⏰ Revenue Cat: getOfferings took 9454ms

4. Other information (e.g. stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow, etc.)

   I must say that I have about fifteen different offerings. And I am calling this method right after SDK setup in order to display a paywall on app opening.

   Not tested on Android yet.

Start by reproducing the first-call latency around Purchases.getOfferings() on iOS using the reported React Native and SDK versions. Compare timing with the setup and roughly fifteen offerings described in the issue; done means identifying and resolving the cause of the excessive initial delay, with the result verified by repeating the timing measurement.