Fix Tests in Simulator

[zkclay]

Hey all, I was taking a look at your testing approach for Aleo programs, and I wanted to contribute my first PR!

In this PR, I made a few different changes in order to for all the tests to pass in the simulator projects. I have summarized the the changes below:

• Made a bunch of rename changes to simulator/src/contracts/pondoProgramsIndex.ts in order to track the renaming that was done in previous commits.
• Fixed an issue in the token registry tests where the code for enforcing the initialize only once test was present in the leo program, but not the javascript.
• Fixed an issue in the token_registry tests where the balances map key was encoded using JSON.stringify on the struct, but was decoded using .to_string() , resulting in the key not being found.
• Fixed an issue in the oracle test where toSpliced(rank, 1) what throwing errors in my environment becuase it is newer javascript syntax, i replicated the functionality using older syntax.