fix(client): unit test works with macos

[jialeicui]

Description

Unit test works with macOS

• symlink can not work with virtualenv (not only in macOS)
• temp dir under macOS is like /var/folders/xx/xxxxxxxxxxxxxxxx/X/, not /tmp/
• macOS use a symlink temp dir for users

mnist demo can not run under macOS for now, will fix it in further PR.

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 #1351 (e5d33bc) into main (50e34eb) will increase coverage by 5.73%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #1351      +/-   ##
============================================
+ Coverage     79.97%   85.71%   +5.73%     
============================================
  Files           294       64     -230     
  Lines         13876     7247    -6629     
  Branches        696        0     -696     
============================================
- Hits          11098     6212    -4886     
+ Misses         2506     1035    -1471     
+ Partials        272        0     -272     

Flag	Coverage Δ
controller	?
standalone	85.71% <ø> (-0.03%)	⬇️
unittests	85.71% <ø> (-0.03%)	⬇️

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

Impacted Files	Coverage Δ
client/starwhale/core/job/scheduler.py	98.27% <0.00%> (-1.73%)	⬇️
client/starwhale/core/job/model.py	95.90% <0.00%> (-0.80%)	⬇️
...tarwhale/mlops/common/util/BatchOperateHelper.java
...ai/starwhale/mlops/domain/job/cache/JobLoader.java
.../starwhale/mlops/domain/system/agent/bo/Agent.java
...i/starwhale/mlops/memory/SwBufferOutputStream.java
...lops/domain/job/step/status/StepStatusMachine.java
...ai/starwhale/mlops/datastore/TableQueryFilter.java
...in/java/ai/starwhale/mlops/common/IdConvertor.java
...hale/mlops/domain/bundle/remove/RemoveManager.java
... and 222 more

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[tianweidut]

LGTM