ctrd: ignore not found error in clean process

[Ace-Tang]

in remove container, we get a clean process, but it only take effect
when unexpect error happen, so ignore error in delete task if container
is not exist, that means remove container is successful.

Signed-off-by: Ace-Tang aceapril@126.com

Ⅰ. Describe what this PR did

Ⅱ. Does this pull request fix one issue?

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

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov]

Codecov Report

Merging #2742 into master will decrease coverage by 0.06%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2742      +/-   ##
==========================================
- Coverage   69.41%   69.34%   -0.07%     
==========================================
  Files         278      278              
  Lines       17447    17448       +1     
==========================================
- Hits        12110    12100      -10     
- Misses       4014     4023       +9     
- Partials     1323     1325       +2

Flag	Coverage Δ
#criv1alpha2_test	39.46% <100%> (-0.08%)	⬇️
#integration_test_0	36.59% <0%> (-0.01%)	⬇️
#integration_test_1	35.54% <0%> (+0.02%)	⬆️
#integration_test_2	36.54% <0%> (-0.03%)	⬇️
#integration_test_3	35.31% <0%> (-0.12%)	⬇️
#node_e2e_test	35.36% <100%> (ø)	⬆️
#unittest	28.43% <0%> (-0.01%)	⬇️

Impacted Files	Coverage Δ
ctrd/container.go	57.36% <100%> (+0.84%)	⬆️
cri/stream/portforward/httpstream.go	70.94% <0%> (-6.84%)	⬇️
daemon/mgr/events.go	89.04% <0%> (-2.74%)	⬇️
cri/stream/runtime.go	67.85% <0%> (-2.39%)	⬇️
ctrd/client.go	64.04% <0%> (-1.69%)	⬇️
cri/v1alpha2/cri.go	71.88% <0%> (-0.26%)	⬇️
daemon/mgr/container.go	60.96% <0%> (+0.2%)	⬆️

[HusterWan]

LGTM

[rudyfly]

LGTM