fix: copy cmd support copy from networkMounts

[ZYecho]

Signed-off-by: zhangyue zy675793960@yeah.net

Ⅰ. Describe what this PR did

current impl doesn't support copy /etc/hosts or /etc/hostname from container, this pr fix it.

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？)

added.

Ⅳ. Describe how to verify it

wait for CI

Ⅴ. Special notes for reviews

None.

[codecov]

Codecov Report

Merging #2892 into master will decrease coverage by 0.63%.
The diff coverage is 86.11%.

@@            Coverage Diff             @@
##           master    #2892      +/-   ##
==========================================
- Coverage    68.7%   68.06%   -0.64%     
==========================================
  Files         291      291              
  Lines       18238    18271      +33     
==========================================
- Hits        12530    12437      -93     
- Misses       4244     4344     +100     
- Partials     1464     1490      +26

Flag	Coverage Δ
#criv1alpha2_test	38.28% <0%> (-0.09%)	⬇️
#integration_test_0	36.13% <0%> (-0.09%)	⬇️
#integration_test_1	35.72% <86.11%> (+0.07%)	⬆️
#integration_test_2	36.03% <0%> (-0.13%)	⬇️
#integration_test_3	?
#node_e2e_test	34.07% <0%> (+0.01%)	⬆️
#unittest	27.99% <0%> (-0.06%)	⬇️

Impacted Files	Coverage Δ
daemon/mgr/container_copy.go	60% <86.11%> (+2.51%)	⬆️
daemon/logger/syslog/fmt.go	0% <0%> (-33.34%)	⬇️
daemon/mgr/image_load.go	39.13% <0%> (-17.4%)	⬇️
daemon/logger/syslog/syslog.go	59.34% <0%> (-16.49%)	⬇️
daemon/mgr/container_checkpoint.go	59.03% <0%> (-9.64%)	⬇️
apis/server/container_bridge.go	83.05% <0%> (-6.95%)	⬇️
apis/server/image_bridge.go	71.53% <0%> (-6.93%)	⬇️
daemon/mgr/volume.go	78.57% <0%> (-4.09%)	⬇️
daemon/mgr/container_logger.go	74.5% <0%> (-3.93%)	⬇️
daemon/logger/syslog/validate.go	52.63% <0%> (-3.16%)	⬇️
... and 15 more

[pouchrobot]

ping @ZYecho
Conflict happens after merging a previous commit.
Please rebase the branch against master and push it back again. Thanks a lot.

[CLAassistant]

)
Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement) before we can accept your contribution.

---

zhangyue seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You have signed the CLA already but the status is still pending? Let us recheck) it.}