Recommended install method fails: No module named 'distutils.cmd'

### Description

Following the README's instructions to install using the recommended method fails with the following output.

```
* Configuring ScanCode for first use...
Traceback (most recent call last):
File "/usr/lib/python3.9/runpy.py", line 197, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/usr/lib/python3.9/runpy.py", line 87, in _run_code
exec(code, run_globals)
File "/home//.local/share/virtualenv/wheel/house/pip-21.2.3-py3-none-any.whl/pip/__main__.py", line 29, in
File "", line 259, in load_module
File "/home//.local/share/virtualenv/wheel/house/pip-21.2.3-py3-none-any.whl/pip/_internal/cli/main.py", line 9, in
File "", line 259, in load_module
File "/home//.local/share/virtualenv/wheel/house/pip-21.2.3-py3-none-any.whl/pip/_internal/cli/autocompletion.py", line 10, in
File "", line 259, in load_module
File "/home//.local/share/virtualenv/wheel/house/pip-21.2.3-py3-none-any.whl/pip/_internal/cli/main_parser.py", line 8, in
File "", line 259, in load_module
File "/home//.local/share/virtualenv/wheel/house/pip-21.2.3-py3-none-any.whl/pip/_internal/cli/cmdoptions.py", line 23, in
File "", line 259, in load_module
File "/home//.local/share/virtualenv/wheel/house/pip-21.2.3-py3-none-any.whl/pip/_internal/cli/parser.py", line 12, in
File "", line 259, in load_module
File "/home//.local/share/virtualenv/wheel/house/pip-21.2.3-py3-none-any.whl/pip/_internal/configuration.py", line 27, in
File "", line 259, in load_module
File "/home//.local/share/virtualenv/wheel/house/pip-21.2.3-py3-none-any.whl/pip/_internal/utils/misc.py", line 42, in
File "", line 259, in load_module
File "/home//.local/share/virtualenv/wheel/house/pip-21.2.3-py3-none-any.whl/pip/_internal/locations/__init__.py", line 14, in
File "", line 259, in load_module
File "/home//.local/share/virtualenv/wheel/house/pip-21.2.3-py3-none-any.whl/pip/_internal/locations/_distutils.py", line 9, in
ModuleNotFoundError: No module named 'distutils.cmd'
Traceback (most recent call last):
File "/usr/lib/python3.9/runpy.py", line 197, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/usr/lib/python3.9/runpy.py", line 87, in _run_code
exec(code, run_globals)
File "/home//Downloads/scancode-toolkit-30.1.0/etc/thirdparty/virtualenv.pyz/__main__.py", line 168, in
File "/home//Downloads/scancode-toolkit-30.1.0/etc/thirdparty/virtualenv.pyz/__main__.py", line 164, in run
File "/home//Downloads/scancode-toolkit-30.1.0/etc/thirdparty/virtualenv.pyz/virtualenv/__main__.py", line 18, in run
File "/home//Downloads/scancode-toolkit-30.1.0/etc/thirdparty/virtualenv.pyz/virtualenv/run/__init__.py", line 32, in cli_run
File "/home//Downloads/scancode-toolkit-30.1.0/etc/thirdparty/virtualenv.pyz/virtualenv/run/session.py", line 47, in run
File "/home//Downloads/scancode-toolkit-30.1.0/etc/thirdparty/virtualenv.pyz/virtualenv/run/session.py", line 60, in _seed
File "/home//Downloads/scancode-toolkit-30.1.0/etc/thirdparty/virtualenv.pyz/virtualenv/seed/embed/pip_invoke.py", line 23, in run
File "/home//Downloads/scancode-toolkit-30.1.0/etc/thirdparty/virtualenv.pyz/virtualenv/seed/embed/pip_invoke.py", line 31, in _execute
RuntimeError: failed seed with code 1
```

Further runs show this error:
```
./scancode: line 122: /home//Downloads/scancode-toolkit-30.1.0/bin/scancode: No such file or directory
```

### How To Reproduce

> Tell us how to reproduce the issue.

```bash
wget https://github.com/nexB/scancode-toolkit/releases/download/v30.1.0/scancode-toolkit-30.1.0_py39-linux.tar.xz
tar xf scancode-toolkit-30.1.0_py39-linux.tar.xz
cd scancode-toolkit-30.1.0/
./scancode --help
```
or with beta release
```bash
wget https://github.com/nexB/scancode-toolkit/releases/download/v31.0.0b3/scancode-toolkit-31.0.0b3_py39-linux.tar.xz
tar xf scancode-toolkit-31.0.0b3_py39-linux.tar.xz
cd scancode-toolkit-31.0.0b3/
./scancode --help
```

### System configuration

* Ubuntu 21.10
* Python 3.9.7
* scancode v30.1.0 - 2021-09-25 or v31.0.0b3 - 2022-04-30
* Downloaded from releases