enhance: Limit import job number

[bigsheeper]

issue: https://github.com/milvus-io/milvus/issues/36890

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 97.50000% with 1 line in your changes missing coverage. Please review.

Project coverage is 80.67%. Comparing base (8669153) to head (949a893). Report is 23 commits behind head on master.

Files with missing lines	Patch %	Lines
internal/datacoord/services.go	90.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #36891      +/-   ##
==========================================
+ Coverage   80.64%   80.67%   +0.02%     
==========================================
  Files        1310     1310              
  Lines      183578   183617      +39     
==========================================
+ Hits       148054   148133      +79     
+ Misses      30393    30371      -22     
+ Partials     5131     5113      -18     

Files with missing lines	Coverage Δ
internal/datacoord/import_job.go	100.00% <100.00%> (ø)
internal/datacoord/import_meta.go	95.09% <100.00%> (+1.46%)	:arrow_up:
pkg/util/paramtable/component_param.go	98.27% <100.00%> (+<0.01%)	:arrow_up:
internal/datacoord/services.go	85.40% <90.00%> (+0.08%)	:arrow_up:

... and 22 files with indirect coverage changes

[mergify[bot]]

@bigsheeper E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[bigsheeper]

/run-cpu-e2e

[mergify[bot]]

@bigsheeper E2e jenkins job failed, comment /run-cpu-e2e can trigger the job again.

[bigsheeper]

/run-cpu-e2e

[czs007]

/approve /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:

• ~~configs/OWNERS~~ [czs007]
• ~~internal/datacoord/OWNERS~~ [czs007]
• ~~pkg/util/OWNERS~~ [czs007]

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