fix: Teardown may cause resource leak

[l1b0k]

In containerd environment , containers cannot be destroyed when cni return err.
This PR can alleviate this situation.

[codecov-commenter]

Codecov Report

Merging #294 (d506c01) into main (9bd1304) will increase coverage by 0.02%.
The diff coverage is 0.00%.

@@           Coverage Diff            @@
##            main    #294      +/-   ##
========================================
+ Coverage   4.46%   4.48%   +0.02%     
========================================
  Files         98      98              
  Lines       9448    9404      -44     
========================================
  Hits         422     422              
+ Misses      8993    8949      -44     
  Partials      33      33              

Flag	Coverage Δ
unittests	4.48% <0.00%> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
plugin/driver/ipvlan.go	0.00% <0.00%> (ø)
plugin/driver/netlink.go	0.00% <0.00%> (ø)
plugin/driver/raw_nic.go	0.00% <ø> (ø)
plugin/driver/utils.go	1.85% <0.00%> (-0.28%)	⬇️
plugin/driver/veth.go	0.00% <0.00%> (ø)
plugin/terway/cni.go	0.18% <0.00%> (+<0.01%)	⬆️

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