[RUNTIME] add ability to terminate/pause/resume a wasm program

[Officeyutong]

I write a new function run_wasm_bpf_module_async to provide the ability to run a wasm program async and to control it.

• It has the same signature as run_wasm_bpf_module.
• This function will return immediately after calling, and leave the wasm program running in another thread
• It will return two handles. WasmProgramHandle provides ability to pause/resume/terminate a wasm program. JoinHandle provides the ability to wait for the finish of the wasm program.
• I use the epoch interruption and the corresponding callback function (which will block the execution of the wasm program) to implement the functions. See https://docs.rs/wasmtime/latest/wasmtime/struct.Store.html#method.epoch_deadline_callback for details.
• I use mpsc channels to implement inter-thread communication. For example, send ProgramOperation::Resume signal to a hanging thread which is stuck on receiving the next operation.

[codecov]

Codecov Report

Merging #84 (9deef0c) into main (3b07511) will increase coverage by 0.54%.
The diff coverage is 92.15%.

❗ Current head 9deef0c differs from pull request most recent head 2cf43b0. Consider uploading reports for the commit 2cf43b0 to get more accurate results

@@            Coverage Diff             @@
##             main      #84      +/-   ##
==========================================
+ Coverage   79.04%   79.58%   +0.54%     
==========================================
  Files          12       14       +2     
  Lines        1188     1264      +76     
==========================================
+ Hits          939     1006      +67     
- Misses        249      258       +9     

Impacted Files	Coverage Δ
runtime/wasm-bpf-rs/src/pipe.rs	34.18% <31.57%> (-3.43%)	⬇️
runtime/wasm-bpf-rs/src/handle.rs	93.75% <93.75%> (ø)
runtime/wasm-bpf-rs/src/lib.rs	83.87% <95.00%> (-4.47%)	⬇️
runtime/wasm-bpf-rs/src/runner.rs	100.00% <100.00%> (ø)
runtime/wasm-bpf-rs/src/state.rs	95.31% <100.00%> (-0.23%)	⬇️
runtime/wasm-bpf-rs/src/tests/mod.rs	99.21% <100.00%> (+0.11%)	⬆️

... and 1 file with indirect coverage changes

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[yunwei37]

nice job!