chore: replace hardcoding /tmp/xxx path

[Standing-Man]

Fixed #933.

Please briefly answer these questions:

• what problem are you trying to solve? (or if there's no problem, what's the motivation for this change?)

i solved to replace hardcoding about temp directory in some test files to manage temporary test folders automatically.

• what changes does this pull request make?

I used this cargo to replace many /tmp/xxx temp directory.

• are there any non-obvious implications of these changes? (does it break compatibility with previous versions, etc)

No need to worry about folder name collision and manage.

[mergify]

@JianMinTang Convert your pr to draft since CI failed

[codecov]

Codecov Report

Attention: Patch coverage is 98.24561% with 1 line in your changes missing coverage. Please review.

Project coverage is 75.12%. Comparing base (e35b35a) to head (87efb60).
Report is 325 commits behind head on master.

Files with missing lines	Patch %	Lines
crates/xline/src/storage/db.rs	94.11%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1018      +/-   ##
==========================================
- Coverage   75.55%   75.12%   -0.44%     
==========================================
  Files         180      190      +10     
  Lines       26938    28483    +1545     
  Branches    26938    28483    +1545     
==========================================
+ Hits        20353    21397    +1044     
- Misses       5366     5783     +417     
- Partials     1219     1303      +84     

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[bsbds]

LGTM, thanks.