feat: allow cache disabling with forks

[7xAquarius]

Motivation

I keep getting RPCProcessError: Unable to launch local RPC client. when I try to fork Avalanche mainnet and testnet.
It's usually one of both working, while the other results in an error.

However, forking with --fork.disableCache on ganache fixes the issue.

What I did

Added support for cache disabling with forks

How I did it

Added support for the already existing --fork.disableCache option from ganache

How to verify it

Add any forked network with --disable_cache=true and launch it
or in config file

networks:
    avax-fork:
        cmd_settings:
            disable_cache: true

Sidenote

ganache also has the --fork.deleteCache option, both works for my issue but idk

Checklist

• I have confirmed that my PR passes all linting checks
• I have included test cases
• I have updated the documentation
• I have added an entry to the changelog

[BlinkyStitt]

I don't think we want to disable cache for all development networks. It can be very helpful on other chains. Can we change this to just disable for avalanche since it doesn't work there?

[7xAquarius]

I agree.
This PR only allows the option to be used, it's not enabled by default on any network.

Maybe I should remove it from test_validate_cmd_settings(), is that what you meant ?

[BlinkyStitt]

From your example comment, I just thought you'd set the default to "true". The default should be "false"

[7xAquarius]

I've replaced development with avax-fork in my config file example, might be easier to understand you're right.

I don't think the default value needs to be set to false somewhere. Similar to the fork option, you set it when you need it.
In fact, it only works when fork option is set