chore: update env for plugin-goat

[aeither]

Relates to:

Risks

Background

What does this PR do?

Update ALCHEMY_API_KEY to EVM_PROVIDER_URL for plugin-goat which is more accurate as user can provide any rpc URL. it is not an alchemy api key what needs to be provided

What kind of change is this?

Documentation changes needed?

Testing

Where should a reviewer start?

Detailed testing steps

[aeither]

Will need to update the documentation

Where?

[odilitime]

search the repo for any mention of ALCHEMY_API_KEY

if none, at a bare minimum include the instructions of the plugin README

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark: