bugfix: fix check annotation format

[Ace-Tang]

fix format check in annotation, allow '=' in value.

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

Ⅰ. Describe what this PR did

allow pouch run --annotation a="b=c", this format shoule be allowed, '=' is not a invalid charactor.

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？)

add unit test.

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov]

Codecov Report

Merging #2267 into master will increase coverage by 0.09%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2267      +/-   ##
==========================================
+ Coverage   66.72%   66.82%   +0.09%     
==========================================
  Files         208      208              
  Lines       16926    16926              
==========================================
+ Hits        11294    11310      +16     
+ Misses       4267     4257      -10     
+ Partials     1365     1359       -6

Flag	Coverage Δ
#criv1alpha1test	32.5% <0%> (ø)	⬆️
#criv1alpha2test	36.12% <0%> (+0.15%)	⬆️
#integrationtest	39.57% <0%> (-0.02%)	⬇️
#nodee2etest	33.46% <0%> (+0.06%)	⬆️
#unittest	23.77% <100%> (+0.01%)	⬆️

Impacted Files	Coverage Δ
apis/opts/spec_annotation.go	100% <100%> (+25%)	⬆️
daemon/mgr/snapshot.go	89.85% <0%> (-4.35%)	⬇️
daemon/mgr/container.go	57.59% <0%> (+0.4%)	⬆️
ctrd/container.go	60.23% <0%> (+1.9%)	⬆️
daemon/containerio/cri_log_file.go	88.23% <0%> (+3.92%)	⬆️
ctrd/watch.go	80.3% <0%> (+4.54%)	⬆️

[allencloud]

LGTM