enhance: Show create time for import job

[bigsheeper]

issue: #45056

[sre-ci-robot]

[ci-v2-notice]
Notice: We are gradually rolling out the new ci-v2 system.

• Legacy CI jobs remain unaffected, you can just ignore ci-v2 if you don't want to run it.
• Additional "ci-v2/*" checkers will run for this PR to ensure the new ci-v2 system is working as expected.
• For tests that exist in both v1 and v2, passing in either system is considered PASS.

To rerun ci-v2 checks, comment with:

• /ci-rerun-code-check // for ci-v2/code-check
• /ci-rerun-build // for ci-v2/build
• /ci-rerun-ut-integration // for ci-v2/ut-integration
• /ci-rerun-ut-go // for ci-v2/ut-go
• /ci-rerun-ut-cpp // for ci-v2/ut-cpp
• /ci-rerun-ut // for all ci-v2/ut-integration, ci-v2/ut-go, ci-v2/ut-cpp

If you have any questions or requests, please contact @zhikunyao.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.93%. Comparing base (7c62726) to head (e115453).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master   #45058       +/-   ##
===========================================
- Coverage   83.79%   76.93%    -6.86%     
===========================================
  Files         510     1843     +1333     
  Lines       79078   286983   +207905     
===========================================
+ Hits        66262   220804   +154542     
- Misses      12816    58966    +46150     
- Partials        0     7213     +7213     

Components	Coverage Δ
Client	78.03% <ø> (∅)
Core	83.79% <ø> (ø)
Go	75.06% <100.00%> (∅)

Files with missing lines	Coverage Δ
internal/datacoord/import_job.go	100.00% <ø> (ø)
internal/datacoord/services.go	85.63% <100.00%> (ø)
...nternal/distributed/proxy/httpserver/handler_v2.go	86.78% <100.00%> (ø)
internal/proxy/impl.go	73.03% <100.00%> (ø)

... and 1329 files with indirect coverage changes

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[czs007]

/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: bigsheeper, czs007

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Needs approval from an approver in each of these files:

• internal/datacoord/OWNERS [czs007]
• internal/distributed/OWNERS [czs007]
• internal/proxy/OWNERS [czs007]
• pkg/proto/OWNERS [czs007]

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