ci: Install libomp on macos (#2404)

Summary:
To resolve nightly / general build issues relating to OpenMP not being found, see https://hud.pytorch.org/pytorch/audio/commit/c6a376cc5679c1940e49fc3e0ba22eaead6c2467



```
-- Found Torch: /Users/distiller/miniconda3/envs/env3.10/lib/python3.10/site-packages/torch/lib/libtorch.dylib
CMake Error at /Users/distiller/miniconda3/envs/env3.10/lib/python3.10/site-packages/cmake/data/CMake.app/Contents/share/cmake-3.22/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
  Could NOT find OpenMP_C (missing: OpenMP_C_FLAGS OpenMP_C_LIB_NAMES)
Call Stack (most recent call first):
  /Users/distiller/miniconda3/envs/env3.10/lib/python3.10/site-packages/cmake/data/CMake.app/Contents/share/cmake-3.22/Modules/FindPackageHandleStandardArgs.cmake:594 (_FPHSA_FAILURE_MESSAGE)
  /Users/distiller/miniconda3/envs/env3.10/lib/python3.10/site-packages/cmake/data/CMake.app/Contents/share/cmake-3.22/Modules/FindOpenMP.cmake:544 (find_package_handle_standard_args)
  CMakeLists.txt:131 (find_package)

-- Configuring incomplete, errors occurred!
```
Signed-off-by: Eli Uriegas <eliuriegas@fb.com>

Pull Request resolved: https://github.com/pytorch/audio/pull/2404

Reviewed By: atalman

Differential Revision: D36495791

Pulled By: seemethere

fbshipit-source-id: 7b6fa2a62fda6fc468cfcbdf8d2163e6b9c327b0

.circleci/config.yml

@@ -53,6 +53,13 @@ commands:
           name: Install CUDA
           command: |
               packaging/windows/internal/cuda_install.bat
+  macos_install_dependencies:
+    description: "Install ci dependencies for macOS"
+    steps:
+      - run:
+          name: Install ci dependencies
+          command: |
+              brew install libomp
 
 binary_common: &binary_common
   parameters:
@@ -292,6 +299,7 @@ jobs:
     steps:
       - checkout
       - load_conda_channel_flags
+      - macos_install_dependencies
       - attach_workspace:
           at: third_party
       - run:
@@ -320,6 +328,7 @@ jobs:
     steps:
       - checkout
       - load_conda_channel_flags
+      - macos_install_dependencies
       - attach_workspace:
           at: third_party
       - run:
@@ -756,6 +765,7 @@ jobs:
     steps:
       - checkout
       - load_conda_channel_flags
+      - macos_install_dependencies
       - attach_workspace:
           at: third_party
       - designate_upload_channel

.circleci/config.yml.in

@@ -53,6 +53,13 @@ commands:
           name: Install CUDA
           command: |
               packaging/windows/internal/cuda_install.bat
+  macos_install_dependencies:
+    description: "Install ci dependencies for macOS"
+    steps:
+      - run:
+          name: Install ci dependencies
+          command: |
+              brew install libomp
 
 binary_common: &binary_common
   parameters:
@@ -292,6 +299,7 @@ jobs:
     steps:
       - checkout
       - load_conda_channel_flags
+      - macos_install_dependencies
       - attach_workspace:
           at: third_party
       - run:
@@ -320,6 +328,7 @@ jobs:
     steps:
       - checkout
       - load_conda_channel_flags
+      - macos_install_dependencies
       - attach_workspace:
           at: third_party
       - run:
@@ -756,6 +765,7 @@ jobs:
     steps:
       - checkout
       - load_conda_channel_flags
+      - macos_install_dependencies
       - attach_workspace:
           at: third_party
       - designate_upload_channel