Update Cadence tests to latest API features

[m-Peter]

Preliminary work to update the Cadence tests to the upcoming API features.
Most notable features include the ability to specify deployment addresses in flow.json config file, thus allowing developers to import the contracts under test, in their tests files. This allows the use of nested types defined in these contracts. E.g.:

let typ = Type<CapabilityDelegator.DelegatorUpdated>()
let events = Test.eventsOfType(typ)
Test.assertEqual(4, events.length)

let event = events[3]! as! CapabilityDelegator.DelegatorUpdated
Test.assert(event.isPublic == false)
Test.assert(event.active == false)

let capabilityType = Type<Capability<&ExampleNFT.Collection{NonFungibleToken.Provider}>>()
Test.assertEqual(capabilityType, event.capabilityType)

The above snippet allows performing assertions on events payload.

[m-Peter]

cc @sisyphusSmiling @austinkline A sneak peek for the features of the next flow-cli release 🙏 (I used a local build to run these tests).

[sisyphusSmiling]

This is awesome @m-Peter! Thanks so much for starting the test updates, very helpful to see the new testing features in context

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8a6faba) 83.95% compared to head (51700ef) 83.95%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #161   +/-   ##
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  Coverage   83.95%   83.95%           
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  Files           4        4           
  Lines         349      349           
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  Hits          293      293           
  Misses         56       56           

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[m-Peter]

@sisyphusSmiling Can you take a look at this please? 🙏

[sisyphusSmiling]

Sorry for the delay @m-Peter, will take a look today. Side note to myself to add a CODEOWNERS file to the repo so PRs get auto-assigned

[sisyphusSmiling]

Fantastic work (as always) on the testing API changes! Thank you for updating the tests here, it's very helpful to see the new API in action. Tests look much cleaner!

Just a couple small comments on test script naming, but not a blocker for merging at all, especially since they're test scripts.