feat: standardize node directory structure #4961

Job	Run time
build (1.21.x, GOARCH=amd64 GOOS=linux, gno)	25s
test (1.21.x, _test.cmd)	1m 32s
build (1.21.x, GOARCH=wasm GOOS=js, gno)	26s
test (1.21.x, _test.pkg)	1m 0s
build (1.22.x, GOARCH=amd64 GOOS=linux, gno)	35s
test (1.21.x, _test.gnolang.native)	28s
build (1.22.x, GOARCH=wasm GOOS=js, gno)	25s
test (1.21.x, _test.gnolang.stdlibs)	52s
test (1.21.x, _test.gnolang.realm)	44s
test (1.21.x, _test.gnolang.pkg0)	1m 52s
test (1.21.x, _test.gnolang.pkg1)	6m 13s
test (1.21.x, _test.gnolang.pkg2)	4m 11s
test (1.21.x, _test.gnolang.other)	35s
test (1.22.x, _test.cmd)	1m 37s
test (1.22.x, _test.pkg)	1m 8s
test (1.22.x, _test.gnolang.native)	31s
test (1.22.x, _test.gnolang.stdlibs)	1m 11s
test (1.22.x, _test.gnolang.realm)	48s
test (1.22.x, _test.gnolang.pkg0)	1m 50s
test (1.22.x, _test.gnolang.pkg1)	6m 28s
test (1.22.x, _test.gnolang.pkg2)	4m 23s
test (1.22.x, _test.gnolang.other)	27s
upload-coverage	25s
	38m 6s

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