[Refactoring] resolved some TODOs items from the source code

[yromanyshyn]

resolved some TODOs from the source code

list of changes:

• added context manager for the wandb run creation
• added comments for the collected check results indexes in the SuiteResult constructor
• added deprecation warning for the with_display parameter (CheckFailure.to_json, SuiteResult.to_json)

[ItayGabbay]

@JKL98ISR can you review?

[yromanyshyn]

@JKL98ISR

note regarding to_wandb method

I marked dedicated_run parameter as deprecated because there is no sense in having it.
It looks like wandb.run is a singleton and you cannot have two or more instances of it simultaneously.

example

import wandb

r1 = wandb.init(project='test1')
r2 = wandb.init(project='test2')

print(wandb.run is r2)  # True
r2.log({'accuraccy': 0.8})
r2.finish()

print(wandb.run is None)  # True
r1.log({'accuraccy': 0.8})  # << will raise "Exception: The wandb backend process has shutdown"    

so, now to_wandb method works in the next way:
if wandb.run is not None, use it otherwise initialize new instance and close it at the end