Implement new with CREATE2 and function call options

[Marenz]

Missing:

• Proper tests for the generated CREATE2 code
• CodeGen for calling functions using the new fn{value:123, gas:43}() syntax or an "not yet implemented" error
• tests for the type checks on the options (i.e. salt has to be bytes32, etc)
• tests and implementation in type checker that options cannot be given twice (neither in same options set (f{value: 0, value: 0}), nor by applying the options set twice (f{value: 0}{value: 0}))
• tests and implementation that salt can only be used starting from the EVM version where create2 was introduced (@Marenz)
• ast json import (@erak)
• documentation (@chriseth)
• test for options with overloaded functions (@chriseth) Overload resolution for .value()-modified functions #526 (comment)

Problems:

We want to parse

callableexpression{value:123, gas:53}(params);

but this also matches

try this.ext() { r = s; } catch (bytes memory) { r = s; }

i was able to work around this, checkout the last commit (parser hack).
However this hack still has a weakness. It can't parse

try this.fn(){value:3, salt:2}(){value:5}() {  } catch (bytes memory) {  }

that is, if fn returns a function and we want to call that function with call options again, it will error (but only in the try/catch case)

I can maybe hack-fix that as well, but it will be even uglier.

I am open to alternative solutions.

[Marenz]

deriven -> derive

[Marenz]

you are repeating in particular here very near each other

[GriffGreen]

Amazing work guys!

[dmihal]

Are there any plans to add support for calculating contract addresses?

[axic]

There was a discussion #2136 (comment), but I think we forgot to follow up on it.

[chriseth]

Created #8798 for this.