issues import support estimate time

[chengjoey]

What type of this PR

Add one of the following kinds:
/kind bugfix

What this PR does / why we need it:

issue import support estimate time, export support finish time

Which issue(s) this PR fixes:

• Fixes #your-issue_number
• Erda Cloud Issue Link

Specified Reviewers:

/assign @your-reviewer

ChangeLog

Need cherry-pick to release versions?

Add comment like /cherry-pick release/1.0 when this PR is merged.

For details on the cherry pick process, see the cherry pick requests section under CONTRIBUTING.md.

[codecov]

Codecov Report

Merging #2882 (95f843f) into master (2cfb17c) will increase coverage by 0.04%.
The diff coverage is 46.93%.

@@            Coverage Diff             @@
##           master    #2882      +/-   ##
==========================================
+ Coverage   17.24%   17.28%   +0.04%     
==========================================
  Files        1295     1295              
  Lines      131855   131896      +41     
==========================================
+ Hits        22736    22802      +66     
+ Misses     106757   106741      -16     
+ Partials     2362     2353       -9     

Impacted Files	Coverage Δ
modules/dop/services/issue/import.go	0.00% <0.00%> (ø)
modules/dop/services/issue/convert.go	47.12% <30.76%> (+14.78%)	⬆️
apistructs/issue.go	8.95% <76.00%> (+4.31%)	⬆️
pkg/mock/mock.go	40.40% <0.00%> (-3.04%)	⬇️
...core/monitor/alert/alert-apis/adapt/alert_route.go	32.55% <0.00%> (-2.33%)	⬇️
modules/cmp/cache/cache.go	53.94% <0.00%> (-0.60%)	⬇️
providers/metrics/report/disruptor.go	64.86% <0.00%> (+5.40%)	⬆️

[Effet]

/cherry-pick release/1.4