fix: Hermes build for visionOS simulator (Release) (#45911)

Summary:
Building for the visionOS simulator in the Release scheme requires an x86_64 slice to be included.

![CleanShot 2024-08-06 at 15 18 29@2x](https://github.com/user-attachments/assets/6fd962eb-ab71-4937-affe-964d8fa39f53)

## Changelog:

[IOS] [FIXED] - Include x86_64 slice when building for visionOS simulator

Pull Request resolved: #45911

Test Plan: CI Green

Reviewed By: GijsWeterings

Differential Revision: D60828872

Pulled By: cipolleschi

fbshipit-source-id: 74444ac0b6661baf427837d242ba0ca295da0d16

packages/react-native/sdks/hermes-engine/utils/build-ios-framework.sh

@@ -12,9 +12,9 @@ set -e
 # Given a specific target, retrieve the right architecture for it
 # $1 the target you want to build. Allowed values: iphoneos, iphonesimulator, catalyst, xros, xrsimulator
 function get_architecture {
-    if [[ $1 == "iphoneos" || $1 == "xros" || $1 == "xrsimulator" ]]; then
+    if [[ $1 == "iphoneos" || $1 == "xros" ]]; then
       echo "arm64"
-    elif [[ $1 == "iphonesimulator" ]]; then
+    elif [[ $1 == "iphonesimulator" || $1 == "xrsimulator" ]]; then
       echo "x86_64;arm64"
     elif [[ $1 == "catalyst" ]]; then
       echo "x86_64;arm64"