ctrd: fix not set mediaType in manifest when commit image

[Ace-Tang]

set mediaType when commit image from container

Signed-off-by: Ace-Tang aceapril@126.com

Ⅰ. Describe what this PR did

Ⅱ. Does this pull request fix one issue?

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

Ⅴ. Special notes for reviews

[codecov]

Codecov Report

Merging #2763 into master will decrease coverage by 0.08%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2763      +/-   ##
==========================================
- Coverage   69.42%   69.34%   -0.09%     
==========================================
  Files         277      277              
  Lines       17412    17418       +6     
==========================================
- Hits        12089    12078      -11     
- Misses       4002     4012      +10     
- Partials     1321     1328       +7

Flag	Coverage Δ
#criv1alpha2_test	39.39% <0%> (-0.03%)	⬇️
#integration_test_0	36.57% <0%> (ø)	⬆️
#integration_test_1	35.88% <100%> (+0.06%)	⬆️
#integration_test_2	36.49% <0%> (+0.01%)	⬆️
#integration_test_3	35.49% <0%> (-0.09%)	⬇️
#node_e2e_test	35.18% <0%> (-0.08%)	⬇️
#unittest	28.5% <0%> (-0.02%)	⬇️

Impacted Files	Coverage Δ
ctrd/image_commit.go	69.28% <100%> (+1.25%)	⬆️
ctrd/watch.go	77.46% <0%> (-5.64%)	⬇️
apis/server/utils.go	71.15% <0%> (-3.85%)	⬇️
ctrd/container.go	55.44% <0%> (-1.73%)	⬇️
pkg/meta/store.go	67.44% <0%> (-1.56%)	⬇️
daemon/mgr/container_utils.go	82.38% <0%> (-1.14%)	⬇️
daemon/mgr/container.go	60.75% <0%> (-0.21%)	⬇️
cri/v1alpha2/cri.go	71.5% <0%> (+0.25%)	⬆️
pkg/streams/utils.go	91.66% <0%> (+2.38%)	⬆️

[fuweid]

LGTM