feature: add Volume Inspect API in daemon side

[allencloud]

Signed-off-by: Allen Sun allensun.shl@alibaba-inc.com

1.Describe what this PR did

This PR adds two API endpoints in swagger.yml:

• GET /volumes/{id}
• DELETE /volumes/{id}

And the second API implementation has been done in code base.

This PR also adds GET /volumes/{id} in the daemon side.

2.Does this pull request fix one issue?
NONE

3.Describe how you did it
NONE

4.Describe how to verify it
NONE

5.Special notes for reviews
NONE

[codecov-io]

Codecov Report

Merging #498 into master will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff           @@
##           master     #498   +/-   ##
=======================================
  Coverage   18.28%   18.28%           
=======================================
  Files          34       34           
  Lines        1766     1766           
=======================================
  Hits          323      323           
  Misses       1408     1408           
  Partials       35       35

Impacted Files	Coverage Δ
daemon/mgr/container.go	4.13% <0%> (ø)	⬆️
daemon/mgr/volume.go	0% <0%> (ø)	⬆️

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[Letty5411]

LGTM