Improve Testing

[lastmjs]

• Implement context sharing in tests, return context from one test and pass it into the next, to remove the need for global variables
• Implement universal expected actual thing for when tests fail

Special Considerations

• audio_and_video has an odd return false situation (maybe an equals that takes no params) in both test cases
  • It's a little more complicated than that, it seems like we don't want to return true at that point we just want to return false if it's false
  • I'm guessing what we actually want to do is return an error at this point
• complex_types could benefit from an equals that takes not parameters
• candid_keywords
• candid_encoding
• audio recorder (tsc failing)
• bitcoin (tsc failing (same as audio recorder ) (saar))
• canister (saar)
• cross_canister_calls
• cycles
• http_outcall_fetch