Jit prover should accept InputJSON format and execute a full block

[ganeshvanahalli]

This PR enables Jit binary to parse/accept the validation input in the form of InputJSON format introduced in #2604 and execute a block.

recordBlock function in system_tests has been updated to produce InputJSON using the caller specified WasmTargets instead of just rawdb.TargetWavm.

Here's an example of how to use the feature:

$> go test github.com/offchainlabs/nitro/system_tests --run TestProgramStorage$ --count=1 --recordBlockInputs.WithBaseDir="some_valid_path" --recordBlockInputs.WithTimestampDirEnabled=false --recordBlockInputs.WithBlockIdInFileNameEnabled=false
ok  	github.com/offchainlabs/nitro/system_tests	4.240s

$> make build-jit   
<... snip lots of output ...>

$> ./target/bin/jit --binary target/machines/latest/replay.wasm --cranelift --json-inputs="some_valid_path/TestProgramStorage/block_input.json"
<... expect a clean exit ...>

Resolves NIT-2821

[tsahee]

nice!
small comment

[tsahee]

LGTM