chore(example):support multiple dataset for custom example

[goldenxinxing]

Description

Modules

• UI
• Controller
• Agent
• Client
• Python-SDK
• Others

Checklist

• run code format and lint check
• add unit test
• add necessary doc

[codecov]

Codecov Report

Merging #1533 (62d9587) into main (4c9e8ba) will increase coverage by 6.12%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #1533      +/-   ##
============================================
+ Coverage     82.06%   88.19%   +6.12%     
============================================
  Files           327       70     -257     
  Lines         16040     8046    -7994     
  Branches        855        0     -855     
============================================
- Hits          13164     7096    -6068     
+ Misses         2529      950    -1579     
+ Partials        347        0     -347     

Flag	Coverage Δ
controller	?
standalone	88.19% <ø> (ø)
unittests	88.19% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
.../ai/starwhale/mlops/domain/user/RoleConvertor.java
...n/CompatibleStorageAccessServiceBuilderAliyun.java
...arwhale/mlops/domain/user/SystemRoleConvertor.java
...java/ai/starwhale/mlops/domain/job/JobManager.java
...s/watchers/log/CancellableTaskLogK8sCollector.java
...starwhale/mlops/domain/project/ProjectService.java
...arwhale/mlops/domain/dataset/po/DatasetEntity.java
...in/java/ai/starwhale/mlops/api/UserController.java
...ale/mlops/storage/fs/StorageAccessServiceFile.java
...mlops/storage/minio/StorageAccessServiceMinio.java
... and 247 more

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[tianweidut]

LGTM