Hui Zhu

I will add special test for wasm when this PR got merged.

/test

jenkins-metrics-ubuntu-20-04 cannot pass is because: Increasing wasm support led to an increase in memory-footprint. The memory-footprint without Wasm support is 123861.750000.(http://jenkins.katacontainers.io/job/kata-containers-2.0-metrics-ubuntu-20-04-PR/2556/console)  With Wasm support is 124995.250000.(http://jenkins.katacontainers.io/job/kata-containers-2.0-metrics-ubuntu-20-04-PR/2538/console)

/test

/test

/test

> Hello @teawater -, I'm not familiar with wasm. Just one question. Does this feature works on non-x86 like on arm? @jongwu yes. It supports any environment that has wasm...

/test

jenkins-ci-ppc64le-ubuntu-20-04 fail is because: ``` Compiling strsim v0.10.0 error[E0463]: can't find crate for `core` | = note: the `powerpc-unknown-linux-gnu` target may not be installed = help: consider downloading the target...

> @teawater It is pretty cool to have wasm support within kata. I wonder what is the status in the container ecosystem for WASM containers? Is there some pod-level annotation...