[sui-json-rpc] Use more efficient parser

[tnowacki]

• Use the newer parser for Moves type tags
• This should improve performance as the newer parser doesn't allocate as much (it doesn't copy out each intermediate string)

[sblackshear]

Could you also fix https://github.com/MystenLabs/sui/blob/main/crates/sui/src/client_commands.rs#L15?

[tnowacki]

Could you also fix https://github.com/MystenLabs/sui/blob/main/crates/sui/src/client_commands.rs#L15?

Done

[velvia]

LGTM, but I guess this is just switching the libraries or functions used. I'm curious about the details of those libraries, but will trust you here. :)

[tnowacki]

LGTM, but I guess this is just switching the libraries or functions used. I'm curious about the details of those libraries, but will trust you here. :)

A quick summary: The original parser for type tags copied each substring while tokenizing. The new parser just creates sub-string references. You can think about it as generating a Iterator<(Tok, String)> vs Iterator<(Tok, &str)>