gnovm

chore: remove deprecated io/ioutil methods #2343

Job	Run time
build (1.20.x, GOARCH=amd64 GOOS=linux, gno)	32s
build (1.20.x, GOARCH=wasm GOOS=js, gno)	47s
test (1.20.x, _test.cmd)	1m 31s
build (1.21.x, GOARCH=amd64 GOOS=linux, gno)	37s
test (1.20.x, _test.pkg)	39s
build (1.21.x, GOARCH=wasm GOOS=js, gno)	48s
test (1.20.x, _test.gnolang.native)	30s
test (1.20.x, _test.gnolang.stdlibs)	55s
test (1.20.x, _test.gnolang.realm)	1m 9s
test (1.20.x, _test.gnolang.pkg0)	2m 11s
test (1.20.x, _test.gnolang.pkg1)	6m 21s
test (1.20.x, _test.gnolang.pkg2)	4m 5s
test (1.20.x, _test.gnolang.other)	52s
test (1.21.x, _test.cmd)	1m 45s
test (1.21.x, _test.pkg)	40s
test (1.21.x, _test.gnolang.native)	31s
test (1.21.x, _test.gnolang.stdlibs)	54s
test (1.21.x, _test.gnolang.realm)	33s
test (1.21.x, _test.gnolang.pkg0)	1m 3s
test (1.21.x, _test.gnolang.pkg1)	5m 57s
test (1.21.x, _test.gnolang.pkg2)	5m 36s
test (1.21.x, _test.gnolang.other)	25s
upload-coverage	0s
	38m 21s

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