fix: fix invalid memory limit

[yeya24]

Signed-off-by: yeya24 yb532204897@gmail.com

Ⅰ. Describe what this PR did

Fix a bug about invalid memory limit.
Here are the outputs of these two stats commands. For pouch, the memory limit is very high, we must constrain this value max to machine memory.

pouch stats 511d
CONTAINER ID   NAME     CPU %   MEM %   MEM USAGE / LIMIT   NET I/O       BLOCK I/O   PIDS
511d54d8e9ac   511d54   0.09%   0.00%   2.285MiB / 8EiB     51.5kB / 0B   0B / 0B     4

docker stats ec57
CONTAINER ID        NAME                CPU %               MEM USAGE / LIMIT     MEM %               NET I/O             BLOCK I/O           PIDS
ec57be63b4a7        eager_stonebraker   0.10%               2.199MiB / 7.682GiB   0.03%               41.3kB / 0B         0B / 0B             4

Ⅱ. Does this pull request fix one issue?

No

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

Currently no.

Ⅳ. Describe how to verify it

pouch stats [container]

Ⅴ. Special notes for reviews

[codecov]

Codecov Report

Merging #2876 into master will decrease coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2876      +/-   ##
==========================================
- Coverage   68.88%   68.85%   -0.03%     
==========================================
  Files         291      291              
  Lines       18249    18251       +2     
==========================================
- Hits        12571    12567       -4     
+ Misses       4228     4227       -1     
- Partials     1450     1457       +7

Flag	Coverage Δ
#criv1alpha2_test	38.38% <0%> (+0.03%)	⬆️
#integration_test_0	36.2% <0%> (-0.04%)	⬇️
#integration_test_1	35.68% <0%> (ø)	⬆️
#integration_test_2	36.17% <100%> (ø)	⬆️
#integration_test_3	35.55% <100%> (-0.04%)	⬇️
#node_e2e_test	34.24% <0%> (+0.03%)	⬆️
#unittest	28.02% <0%> (-0.01%)	⬇️

Impacted Files	Coverage Δ
daemon/config/config.go	69.51% <ø> (ø)	⬆️
daemon/mgr/container_stats.go	71.34% <100%> (+0.32%)	⬆️
ctrd/watch.go	72.97% <0%> (-5.41%)	⬇️
cri/ocicni/netns.go	58.1% <0%> (-2.71%)	⬇️
cri/ocicni/cni_manager.go	59.25% <0%> (-1.86%)	⬇️
daemon/logger/jsonfile/utils.go	71.54% <0%> (-1.63%)	⬇️
ctrd/client.go	64.65% <0%> (-1.4%)	⬇️
ctrd/container.go	53.91% <0%> (-0.39%)	⬇️
cri/v1alpha2/cri.go	69.31% <0%> (+0.25%)	⬆️
pkg/streams/utils.go	89.28% <0%> (+7.14%)	⬆️

[ZYecho]

LGTM

[allencloud]

Thanks a lot for your great work. Merging... @yeya24