cmd/evm: add state transition tool for testing (#20958)

This PR implements the EVM state transition tool, which is intended
to be the replacement for our retesteth client implementation.
Documentation is present in the cmd/evm/README.md file.

Co-authored-by: Felix Lange <fjl@twurst.com>

cmd/evm/testdata/5/alloc.json

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+{}

cmd/evm/testdata/5/env.json

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+{
+  "currentCoinbase": "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+  "currentDifficulty": "0x20000",
+  "currentGasLimit": "0x750a163df65e8a",
+  "currentNumber": "1",
+  "currentTimestamp": "1000",
+  "ommers": [
+    {"delta":  1, "address": "0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb" },
+    {"delta":  2, "address": "0xcccccccccccccccccccccccccccccccccccccccc" }
+  ]
+}

cmd/evm/testdata/5/readme.md

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+These files examplify a transition where there are no transcations, two ommers, at block `N-1` (delta 1) and `N-2` (delta 2).

cmd/evm/testdata/5/txs.json

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+[]