feat: make parameters of API plugin extendable

[seeflood]

What this PR does:

1. Modify parameters of NewGrpcAPI to make it extendable. New fields can be added without refactor all the existing api plugins:
   

2. Modify workflow to run tests parallelly;
   

3. Modify codecov configuration to ignore more files

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov]

Codecov Report

Merging #369 (5992302) into main (aa38400) will increase coverage by 0.07%.
The diff coverage is 84.00%.

@@            Coverage Diff             @@
##             main     #369      +/-   ##
==========================================
+ Coverage   57.97%   58.05%   +0.07%     
==========================================
  Files         106      106              
  Lines        5633     5638       +5     
==========================================
+ Hits         3266     3273       +7     
+ Misses       2032     2031       -1     
+ Partials      335      334       -1     

Impacted Files	Coverage Δ
components/rpc/callback/callback.go	55.55% <ø> (ø)
components/rpc/invoker/mosn/channel/connpool.go	86.04% <ø> (ø)
components/rpc/invoker/mosn/channel/xchannel.go	83.87% <ø> (+3.22%)	⬆️
components/rpc/invoker/mosn/mosninvoker.go	65.00% <ø> (ø)
components/rpc/types.go	53.84% <ø> (ø)
pkg/grpc/default_api/api.go	75.80% <0.00%> (-0.25%)	⬇️
components/rpc/invoker/mosn/channel/httpchannel.go	71.11% <100.00%> (ø)
pkg/actuator/info/endpoint.go	75.00% <100.00%> (+6.81%)	⬆️
pkg/grpc/dapr/dapr_api.go	56.96% <100.00%> (+0.55%)	⬆️
pkg/runtime/runtime.go	54.88% <100.00%> (ø)
... and 2 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update aa38400...5992302. Read the comment docs.

[wenxuwan]

LGTM

[wenxuwan]

LGTM

[wenxuwan]

LGTM