platform: etherscan: add support for viaIR #2339

Job	Run time
tests (ubuntu-latest, brownie)	56s
tests (ubuntu-latest, buidler)	31s
tests (ubuntu-latest, dapp)	57s
tests (ubuntu-latest, hardhat)	56s
tests (ubuntu-latest, solc)	26s
tests (ubuntu-latest, truffle)	48s
tests (ubuntu-latest, waffle)	40s
tests (ubuntu-latest, foundry)	27s
tests (ubuntu-latest, standard)	17s
tests (ubuntu-latest, vyper)	15s
tests (ubuntu-latest, solc_multi_file)	19s
tests (ubuntu-latest, hardhat_multi_file)	56s
tests (windows-2022, brownie)	45s
tests (windows-2022, buidler)	49s
tests (windows-2022, hardhat)	50s
tests (windows-2022, solc)	45s
tests (windows-2022, truffle)	53s
tests (windows-2022, waffle)	43s
tests (windows-2022, standard)	41s
tests (windows-2022, vyper)	46s
tests (windows-2022, solc_multi_file)	45s
tests (windows-2022, hardhat_multi_file)	46s
	15m 11s

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