style(08-wasm): renamed 'grandpaClientID' -> 'defaultWasmClientID'

[srdtrk]

Description

closes: #XXXX

Commit Message / Changelog Entry

style(08-wasm): renamed 'grandpaClientID' -> 'defaultWasmClientID'

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[damiannolan]

🚀

[DimitrisJim]

grepping for this I find a couple more in misbehaviour_handle_test.go, commented out tho and likely to be replaced, still good to switch em up just in case tho