wasm sdk: recover from panic

[boddumanohar]

when ever there is an panic within wasm functions, for example:

https://github.com/0chain/gosdk/blob/fc71195dd1e876de6d9d375005aea8a98e8972ae/wasmsdk/allocation.go#L52-L53

In this wasm function, datashards is expected to be int. But if you pass dataShards as string, then gowasm crashes and returns an error

Go instance is not active

To fix this, the go wasm instance should be able to recover from panic during its execution.

[cnlangzi]

please convert it into number before call it.

[boddumanohar]

The fix doesn't seems solve the isse completely. whenever there is a panic in wasm, the web-apps breatks.

[cnlangzi]

it fixed input panicking issue. but don't catch generic panicking issue in code.

[boddumanohar]

fixed by: https://github.com/0chain/gosdk/pull/1071