chore: change pipeline.yml migration database from pipeline env

[iutx]

What this PR does / why we need it:

change pipeline.yml migration database from pipeline env

Which issue(s) this PR fixes:

• Fixes #your-issue_number
• [Erda Cloud Issue Link](paste your link here)

Specified Reviewers:

/assign @sfwn

ChangeLog

Language	Changelog
🇺🇸 English	change pipeline.yml migration database from pipeline env
🇨🇳 中文	修改流水线 migration 数据库从环境变量获取

Need cherry-pick to release versions?

Add comment like /cherry-pick release/1.0 when this PR is merged.

For details on the cherry pick process, see the cherry pick requests section under CONTRIBUTING.md.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 15.61%. Comparing base (f5acecb) to head (e06a92c).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6451      +/-   ##
==========================================
- Coverage   15.62%   15.61%   -0.01%     
==========================================
  Files        3674     3674              
  Lines      311610   311277     -333     
==========================================
- Hits        48679    48604      -75     
+ Misses     257473   257248     -225     
+ Partials     5458     5425      -33     

Flag	Coverage Δ
by-github-actions	15.61% <ø> (-0.01%)	⬇️

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

see 8 files with indirect coverage changes

[sfwn]

/approve