Nemo gets installed in legacy version because it couldn't build a wheel
**Describe the bug**

I am using google colab for using nemo, nemo supports python 3.8 but colab has python 3.7, I can succesfully install python 3.8 in colab and pip but when I try to install nemo, it gives me an error in the end that nemo got installed in legacy version becaue pip failed to build a wheel. After using the `!pip install git+https://github.com/NVIDIA/NeMo.git@main#egg=nemo_toolkit[all] --verbose --log ./pip.log` and reading the logs, I find this 

> Traceback (most recent call last):
> File "<string>", line 2, in <module>
> File "<pip-setuptools-caller>", line 34, in <module>
> File "/tmp/pip-install-0anzil8f/nemo-toolkit_8b9af28d0a0a4f5d861548d9508e4c38/setup.py", line 209, in <module>
> setuptools.setup(
> File "/usr/local/lib/python3.8/dist-packages/setuptools/__init__.py", line 153, in setup
> return distutils.core.setup(**attrs)
> File "/usr/lib/python3.8/distutils/core.py", line 148, in setup
> dist.run_commands()
> File "/usr/lib/python3.8/distutils/dist.py", line 966, in run_commands
> self.run_command(cmd)
> File "/usr/lib/python3.8/distutils/dist.py", line 985, in run_command
> cmd_obj.run()
> File "/usr/lib/python3/dist-packages/wheel/bdist_wheel.py", line 256, in run
> self.egg2dist(self.egginfo_dir,
> File "/usr/lib/python3/dist-packages/wheel/bdist_wheel.py", line 426, in egg2dist
> pymeta = pkginfo_to_dict(metadata_path,
> File "/usr/lib/python3/dist-packages/wheel/metadata.py", line 177, in pkginfo_to_dict
> new_requirements = sorted(convert_requirements(requirements))
> File "/usr/lib/python3/dist-packages/wheel/metadata.py", line 234, in convert_requirements
> parsed_requirement = pkg_resources.Requirement.parse(req)
> File "/usr/local/lib/python3.8/dist-packages/pkg_resources/__init__.py", line 3154, in parse
> req, = parse_requirements(s)
> ValueError: too many values to unpack (expected 1)

**Steps/Code to reproduce bug**

Install python 3.8 and then run this


**Expected behavior**
Nemo should be installed correctly and its logs should show any problem.

**Environment overview (please complete the following information)**

 - Environment location: Colab
 - Method of NeMo install: [pip install or from source]. `!pip install git+https://github.com/NVIDIA/NeMo.git@main#egg=nemo_toolkit[all] --verbose --log ./pip.log`

**Environment details**

If NVIDIA docker image is used you don't need to specify these.
Otherwise, please provide:
- Ubuntu (colab)
- pytorch 1.12+cu116
- Python 3.8


