Tests: Rename ios_available_rawvalue_enum_on_visionos.swift.

Follow the naming pattern of the existing SILGen tests for RawRepresentable.

Author: tshortli

test/SILGen/ios_available_rawvalue_enum_on_visionos.swift renamed to test/SILGen/enum_raw_representable_available_visionos_ios.swift

@@ -4,8 +4,8 @@
 // RUN: cp -r %test-resource-dir/xros/Swift.swiftmodule %t/mock-sdk/usr/lib/swift/Swift.swiftmodule
 // RUN: cp %S/Inputs/mock-visionos-sdk/SDKSettings.json %t/mock-sdk/SDKSettings.json
 // RUN: %swift -emit-sil -parse-as-library %s -target arm64-apple-xros1.0 -sdk %t/mock-sdk -I %t/mock-sdk/usr/lib/swift/ -verify
-// RUN: %swift -emit-silgen -parse-as-library %s -target arm64-apple-xros1.0 -sdk %t/mock-sdk -I %t/mock-sdk/usr/lib/swift/ -o %t/ios_available_rawvalue_enum_on_visionos.sil
-// RUN: %FileCheck %s < %t/ios_available_rawvalue_enum_on_visionos.sil
+// RUN: %swift -emit-silgen -parse-as-library %s -target arm64-apple-xros1.0 -sdk %t/mock-sdk -I %t/mock-sdk/usr/lib/swift/ -o %t/output.sil
+// RUN: %FileCheck %s < %t/output.sil
 
 // REQUIRES: OS=xros