Add contractLocation field to transaction output

[nguyer]

This (combined with an upcoming PR in Evmconnect and FireFly Core) brings the contract address of a deployed contract all the way through to the transaction output. This shows up in a JSONAny field called contractLocation and looks like this in FireFly:

...
    "output": {
        "Headers": {
            "requestId": "default:aa155a3c-2591-410e-bc9d-68ae7de34689",
            "type": "TransactionSuccess"
        },
        "contractLocation": {
            "address": "0x24746b95d118b2b4e8d07b06b1bad988fbf9415d"
        },
        "protocolId": "000000000024/000000",
        "transactionHash": "0x32d1144091877266d7f0426e48db157e7d1a857c62e6f488319bb09243f0f851"
    },
...

[codecov-commenter]

Codecov Report

Merging #61 (1f0341c) into main (8f3be12) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #61   +/-   ##
=======================================
  Coverage   99.96%   99.96%           
=======================================
  Files          59       59           
  Lines        3231     3233    +2     
=======================================
+ Hits         3230     3232    +2     
  Misses          1        1           

Impacted Files	Coverage Δ
pkg/fftm/policyloop.go	100.00% <100.00%> (ø)

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[peterbroadhurst]

Looks great - I did see a capital H in your sample, which might be worth looking at (although I don't see any evidence you introduced that).