bugfix: fix update container rootfs disk quota recursively timeout

[zjumoon01]

Updating disk quota to a running container will set quota ID to all files
and directories under UpperDir in function SetQuotaForDir, which will
take a long while. Because it will costs much time in
getMountpointFstype, CheckRegularFile and filepath.Walk.

Call SetQuotaForDir Asynchronously when updating disk quota .

Signed-off-by: Wang Rui baijia.wr@antfin.com

Ⅰ. Describe what this PR did

This patch will optimize efficiency of updating disk quota. It may take a long while in function SetQuotaForDir if container has a lot of new files and directories in UpperDir.

So we can change to call SetQuotaForDir in go routine.

Ⅱ. Does this pull request fix one issue?

NONE

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

step 1. Run many containers with disk quota so that /proc/mounts has a lot of lines
step 2. Make a running container create many files and directories.
step3. Before this path, update disk quota of this container will take a log while. After this path, it will be more efficient.

Ⅴ. Special notes for reviews

[codecov]

Codecov Report

Merging #2922 into master will decrease coverage by 0.08%.
The diff coverage is 12.5%.

@@            Coverage Diff             @@
##           master    #2922      +/-   ##
==========================================
- Coverage   68.23%   68.14%   -0.09%     
==========================================
  Files         291      291              
  Lines       18328    18330       +2     
==========================================
- Hits        12506    12491      -15     
- Misses       4368     4374       +6     
- Partials     1454     1465      +11

Flag	Coverage Δ
#criv1alpha2_test	34.79% <12.5%> (-0.04%)	⬇️
#integration_test_0	36.08% <12.5%> (+0.01%)	⬆️
#integration_test_1	35.56% <12.5%> (+0.06%)	⬆️
#integration_test_2	36.1% <12.5%> (+0.06%)	⬆️
#integration_test_3	35.6% <12.5%> (-0.04%)	⬇️
#node_e2e_test	34.15% <12.5%> (-0.2%)	⬇️
#unittest	27.98% <0%> (ø)	⬆️

Impacted Files	Coverage Δ
storage/quota/quota.go	6.45% <0%> (-0.07%)	⬇️
daemon/mgr/container.go	59.93% <0%> (-0.42%)	⬇️
daemon/mgr/container_storage.go	54.9% <33.33%> (ø)	⬆️
cri/ocicni/netns.go	58.1% <0%> (-2.71%)	⬇️
ctrd/container.go	52% <0%> (-2.3%)	⬇️
ctrd/supervisord/daemon.go	49.32% <0%> (-1.36%)	⬇️
cri/ocicni/cni_manager.go	61.32% <0%> (-0.95%)	⬇️
cri/v1alpha2/cri.go	63.53% <0%> (-0.51%)	⬇️
daemon/mgr/container_utils.go	76.76% <0%> (+0.5%)	⬆️
... and 3 more