Replace random.py with np_random

[hh2564]

Description

Main changes: 
Remove random.py and replace with self.np_random

rand.float is now replaced with np_random.uniform
rand.bool is now replaced with np_random.integers(0,2) == 0
rand.choice is now replaced with list[np_random.choice(len(list))]
rand.color is now replaced with colorlist[np_random.choice(len(colorlist))]
pytest file is modified to compliant with deleting random.py

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• I have run the pre-commit checks with pre-commit run --all-files (see CONTRIBUTING.md instructions to set it up)
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[pseudo-rnd-thoughts]

Thanks, looks good
Do you think this will be backward compatible?