Make stubgen emit `move` closures by default. #1380

Job	Run time
Check lint and rustfmt	2m 25s
Check rustdoc WASM target	11s
Run JS linters	1m 5s
Check fuzz targets	39s
Run tests	6m 12s
WASM tests	1m 15s
Python tests and maturin build (3.9)	1m 13s
Python tests and maturin build (3.10)	1m 25s
pre-publish checks	0s
Python tests and maturin build (3.11)	1m 30s
Python tests and maturin build (3.12)	1m 25s
All CI stages	3s
pre-publish checks	0s
publish trustfall_filetests_macros	0s
publish trustfall_core	0s
publish python trustfall	0s
publish trustfall_derive	0s
publish trustfall	0s
publish trustfall_stubgen	0s
	17m 23s

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