Revert "feature: independent runtime root"

[fuweid]

Reverts #2748

[codecov]

Codecov Report

Merging #2758 into master will decrease coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2758      +/-   ##
==========================================
- Coverage   69.44%   69.41%   -0.03%     
==========================================
  Files         277      277              
  Lines       17412    17412              
==========================================
- Hits        12091    12087       -4     
- Misses       4000     4002       +2     
- Partials     1321     1323       +2

Flag	Coverage Δ
#criv1alpha2_test	39.4% <100%> (-0.02%)	⬇️
#integration_test_0	36.6% <100%> (+0.02%)	⬆️
#integration_test_1	35.8% <100%> (ø)	⬆️
#integration_test_2	36.53% <100%> (ø)	⬆️
#integration_test_3	35.45% <100%> (-0.11%)	⬇️
#node_e2e_test	35.29% <100%> (ø)	⬆️
#unittest	28.51% <0%> (ø)	⬆️

Impacted Files	Coverage Δ
ctrd/container.go	56.21% <100%> (-0.39%)	⬇️
cri/v1alpha2/cri.go	71.63% <0%> (-0.26%)	⬇️

[pouchrobot]

Thanks for your contribution. 🍻 @fuweid
While we thought PR Description could be more specific, longer than 100 chars.
Please edit this PR title instead of opening a new one.
More details, please refer to https://github.com/alibaba/pouch/blob/master/CONTRIBUTING.md

[pouchrobot]

@fuweid Thanks for your contribution. 🍻
Please sign off in each of your commits.

[fuweid]

we need to evaluate the impact to the existing running container. before we have fully tested on this, we revert it first.

[zhuangqh]

LGTM