feat(nox): Replacing session with environment variable

[andi4191]

Signed-off-by: Anurag Dixit a.dixit91@gmail.com

Description

Reduced host dependency based sessions from nox lists.
Switched to environment variable based context switching. Reduces redundant sessions. We already have multiple sessions as per different Python versions.

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes # (issue)
#1056

Type of change

Please delete options that are not relevant and/or add your own.

• New feature (non-breaking change which adds functionality)

Checklist:

• My code follows the style guidelines of this project (You can use the linters)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas and hacks
• I have made corresponding changes to the documentation
• I have added tests to verify my fix or my feature
• New and existing unit tests pass locally with my changes

[github-actions]

Code conforms to Python style guidelines

[github-actions]

Code conforms to Python style guidelines

[github-actions]

Code conforms to C++ style guidelines

[github-actions]

Code conforms to C++ style guidelines

[andi4191]

/blossom-ci

[narendasan]

Can you add documentation to note that these env variables exist?

[andi4191]

Can you add documentation to note that these env variables exist?

@narendasan : Added documentation for the same.

[github-actions]

Code conforms to C++ style guidelines

[github-actions]

Code conforms to Python style guidelines