feature: add no-trunc flag for pouch images

[ZYecho]

Signed-off-by: zhangyue [email protected]

Ⅰ. Describe what this PR did

As the title desc， add a --no-trunc flag for pouch images cmd to show to whole image Id, also and cli samples to end-users.

Ⅱ. Does this pull request fix one issue?

fixes #2371

Ⅲ. Why don't you add test cases (unit test/integration test)? (你真的觉得不需要加测试吗？)

add test.

Ⅳ. Describe how to verify it

go test -gocheck.f PouchImagesSuite

Ⅴ. Special notes for reviews

None.

[codecov]

Codecov Report

Merging #2374 into master will decrease coverage by 2.33%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2374      +/-   ##
==========================================
- Coverage   66.82%   64.48%   -2.34%     
==========================================
  Files         265      265              
  Lines       18211    18211              
==========================================
- Hits        12169    11743     -426     
- Misses       4637     5176     +539     
+ Partials     1405     1292     -113

Flag	Coverage Δ
#criv1alpha1test	43.82% <ø> (+12.34%)	⬆️
#criv1alpha2test	35.58% <ø> (-64.42%)	⬇️
#integrationtest	39.43% <ø> (-0.13%)	⬇️
#nodee2etest	32.99% <ø> (+0.01%)	⬆️
#unittest	25.52% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
cri/v1alpha1/cri_types.go	0% <0%> (-100%)	⬇️
cri/v1alpha1/service/cri.go	0% <0%> (-84.62%)	⬇️
cri/v1alpha1/server.go	0% <0%> (-79.2%)	⬇️
cri/v1alpha1/cri.go	0% <0%> (-60.39%)	⬇️
cri/v1alpha1/cri_wrapper.go	0% <0%> (-55.31%)	⬇️
cri/v1alpha1/cri_stream.go	28.57% <0%> (-37.15%)	⬇️
cri/criservice.go	34.52% <0%> (-21.43%)	⬇️
cri/ocicni/cni_manager.go	59.18% <0%> (-12.25%)	⬇️
daemon/mgr/system.go	70.49% <0%> (-5.74%)	⬇️
apis/server/utils.go	71.15% <0%> (-3.85%)	⬇️
... and 16 more

[fuweid]

LGTM