Enable default features for wasmtime #1058

Job	Run time
build test data	3m 17s
test with NullVM on Linux/x86_64	2m 36s
test with NullVM on Linux/x86_64 with ASan	3m 1s
test with NullVM on Linux/x86_64 with TSan	3m 10s
test with NullVM on Windows/x86_64	5m 39s
test with V8 on Linux/x86_64	1m 35s
test with V8 on Linux/x86_64 with ASan	2m 55s
test with V8 on Linux/x86_64 with TSan	4m 0s
test with V8 on Linux/x86_64 with GCC	1m 13s
test with V8 on Linux/aarch64	2h 6m 48s
test with V8 on macOS/x86_64	4h 41m 21s
test with WAMR interp on Linux/x86_64	2m 17s
test with WAMR interp on macOS/x86_64	5m 48s
test with WAMR jit on Linux/x86_64	1h 30m 54s
test with WAMR jit on macOS/x86_64	1h 53m 19s
test with WasmEdge on Linux/x86_64	7m 2s
test with WasmEdge on macOS/x86_64	12m 1s
test with Wasmtime on Linux/x86_64	16m 1s
test with Wasmtime on Linux/x86_64 with ASan	10m 17s
build with Wasmtime on Linux/aarch64	14m 1s
test with Wasmtime on Linux/s390x	2h 53m 29s
test with Wasmtime on macOS/x86_64	4m 28s
test with Wasmtime on Windows/x86_64	8m 30s
test with WAVM on Linux/x86_64	2h 9m 28s
	17h 3m 10s

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