Add dep on Accelerate framework to torch podspecs (#88422)

A dep on Accelerate was added in https://github.com/pytorch/pytorch/pull/80449 We need to declare this dep in our podspec, otherwise users will have to add the Accelerate framework to their projects manually.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/88422
Approved by: https://github.com/kimishpatel, https://github.com/malfet

ios/LibTorch-Lite.podspec

@@ -33,4 +33,5 @@ Pod::Spec.new do |s|
         'VALID_ARCHS' => 'x86_64 arm64'
     }
     s.library = ['c++', 'stdc++']
+    s.frameworks = 'Accelerate'
 end

ios/LibTorch.podspec

@@ -33,4 +33,5 @@ Pod::Spec.new do |s|
         'VALID_ARCHS' => 'x86_64 arm64'
     }
     s.library = ['c++', 'stdc++']
+    s.frameworks = 'Accelerate'
 end