Pin test tool versions in CI (#2422)

Summary:
All the unittests jobs are failing due to import error due to protobuf and scipy.
This commit pins the versions of them to an older version.

## protobuf

https://app.circleci.com/pipelines/github/pytorch/audio/10979/workflows/42005226-ca7e-471c-80f4-db09f4bd2089/jobs/692078

```
E   TypeError: Descriptors cannot not be created directly.
E   If this call came from a _pb2.py file, your generated code is out of date and must be regenerated with protoc >= 3.19.0.
E   If you cannot immediately regenerate your protos, some other possible workarounds are:
E    1. Downgrade the protobuf package to 3.20.x or lower.
E    2. Set PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python (but this will use pure-Python parsing and will be much slower).
E
E   More information: https://developers.google.com/protocol-buffers/docs/news/2022-05-06#python-updates
```

https://github.com/protocolbuffers/protobuf/issues/10051
https://github.com/PyTorchLightning/pytorch-lightning/issues/13159

## scipy (pypocketfft)

1.8.1 is causing issue.

https://app.circleci.com/pipelines/github/pytorch/audio/10980/workflows/470a9361-4cc5-4d7c-9264-28fc8b86f1cb/jobs/692267

    ```
    ../env/lib/python3.9/site-packages/librosa/core/audio.py:11: in <module>
        import scipy.signal
    ../env/lib/python3.9/site-packages/scipy/signal/__init__.py:309: in <module>
        from . import _sigtools, windows
    ../env/lib/python3.9/site-packages/scipy/signal/windows/__init__.py:41: in <module>
        from ._windows import *
    ../env/lib/python3.9/site-packages/scipy/signal/windows/_windows.py:7: in <module>
        from scipy import linalg, special, fft as sp_fft
    ../env/lib/python3.9/site-packages/scipy/fft/__init__.py:91: in <module>
        from ._helper import next_fast_len
    ../env/lib/python3.9/site-packages/scipy/fft/_helper.py:3: in <module>
        from ._pocketfft import helper as _helper
    ../env/lib/python3.9/site-packages/scipy/fft/_pocketfft/__init__.py:3: in <module>
        from .basic import *
    ../env/lib/python3.9/site-packages/scipy/fft/_pocketfft/basic.py:6: in <module>
        from . import pypocketfft as pfft
    E   ImportError: /home/circleci/project/env/lib/python3.9/site-packages/torch/lib/../../../.././libstdc++.so.6: version `GLIBCXX_3.4.30' not found (required by /home/circleci/project/env/lib/python3.9/site-packages/scipy/fft/_pocketfft/pypocketfft.cpython-39-x86_64-linux-gnu.so)

Pull Request resolved: https://github.com/pytorch/audio/pull/2422

Reviewed By: atalman

Differential Revision: D36764198

Pulled By: mthrok

fbshipit-source-id: 897a79fe9c3165206c2e747147fd0f257fc4f683

.circleci/unittest/linux/scripts/install.sh

@@ -70,7 +70,7 @@ fi
 (
     set -x
     conda install -y -c conda-forge ${NUMBA_DEV_CHANNEL} 'librosa>=0.8.0' parameterized 'requests>=2.20'
-    pip install kaldi-io SoundFile coverage pytest pytest-cov scipy transformers expecttest unidecode inflect Pillow sentencepiece pytorch-lightning
+    pip install kaldi-io SoundFile coverage pytest pytest-cov 'scipy==1.7.3' transformers expecttest unidecode inflect Pillow sentencepiece pytorch-lightning 'protobuf<4.21.0'
 )
 # Install fairseq
 git clone https://github.com/pytorch/fairseq

.circleci/unittest/windows/scripts/install.sh

@@ -78,9 +78,10 @@ esac
         pytest \
         pytest-cov \
         pytorch-lightning \
-        scipy \
+        'scipy==1.7.3' \
         transformers \
-        unidecode
+        unidecode \
+        'protobuf<4.21.0'
 )
 # Install fairseq
 git clone https://github.com/pytorch/fairseq