feat: dynamic load wasm file(#191)

[nanjingboy]

What this PR does:

• dynamic load wasm file New Feature: dynamic load wasm file #191
• update docs for wasm

Special notes for your reviewer:

there are three apis to install, update instance number, and unintall WASM file.

• install

curl -H "Accept: application/json" -H "Content-type: application/json" -X POST -d '{"name":"id_1","instance_num":2,"vm_config":{"engine":"wasmer","path":"demo/faas/code/golang/client/function_1.wasm"}}'  http://127.0.0.1:34998/wasm/install

• update instance number

curl -H "Accept: application/json" -H "Content-type: application/json" -X POST -d '{"name":"id_1","instance_num":2}'  http://127.0.0.1:34998/wasm/update

• uninstall

curl -H "Accept: application/json" -H "Content-type: application/json" -X POST -d '{"name":"id_1"}' http://127.0.0.1:34998/wasm/uninstall

[nanjingboy]

@seeflood

[zhenjunMa]

Cool👏👍

[seeflood]

Coool!

[codecov]

Codecov Report

Merging #577 (9fa167e) into main (41d3720) will decrease coverage by 0.27%.
The diff coverage is 32.29%.

@@            Coverage Diff             @@
##             main     #577      +/-   ##
==========================================
- Coverage   60.89%   60.62%   -0.28%     
==========================================
  Files         122      125       +3     
  Lines        6432     6539     +107     
==========================================
+ Hits         3917     3964      +47     
- Misses       2133     2195      +62     
+ Partials      382      380       -2     

Impacted Files	Coverage Δ
pkg/filter/stream/common/http/dispatch_filter.go	0.00% <0.00%> (ø)
pkg/filter/stream/common/http/factory.go	0.00% <0.00%> (ø)
pkg/filter/stream/common/http/path_resolver.go	100.00% <ø> (ø)
pkg/wasm/dispatch.go	23.80% <0.00%> (+23.80%)	⬆️
pkg/wasm/filter.go	0.00% <0.00%> (ø)
pkg/wasm/factory.go	18.18% <23.23%> (-6.31%)	⬇️
pkg/actuator/actuator.go	100.00% <100.00%> (ø)
pkg/actuator/health/endpoint.go	77.50% <100.00%> (ø)
pkg/actuator/info/endpoint.go	75.00% <100.00%> (ø)
pkg/filter/stream/common/http/request_handler.go	100.00% <100.00%> (ø)
... and 6 more

---

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[nanjingboy]

@zhenjunMa 做了以下修改：

1. 所以接口独立出单独的端口，不再属于 2045 端口。
2. 尽量达到代码复用。

有空再 review 下哈 ^ _ ^

[zhenjunMa]

@nanjingboy I'm so sorry for the delay, I have finished the review, please add some unit tests to pass the codecov check👀

[nanjingboy]

@nanjingboy I'm so sorry for the delay, I have finished the review, please add some unit tests to pass the codecov check👀

OK，I'll deal with it as soon as possible

[nanjingboy]

@zhenjunMa the code is updated，please review it again

[zu1k]

LGTM

[seeflood]

lgtm.

[seeflood]

@nanjingboy Thanks for this great feature!

[nanjingboy]

@nanjingboy Thanks for this great feature!

😄