feat: additional flag to force start manager-api

[bisakhmondal]

Please answer these questions before submitting a pull request, or your PR will get closed.

Why submit this pull request?

• Bugfix
• New feature provided
• Improve performance
• Backport patches

What changes will this PR take into?
additional flag -f or --force to force start Manager API with different configuration maybe when a PID file is already existing.

Related issues

in continuation with #1814
#1814 (comment)

Checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?
• Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first

[netlify]

✔️ Deploy Preview for apisix-dashboard ready!

🔨 Explore the source changes: 6d94496

🔍 Inspect the deploy log: https://app.netlify.com/sites/apisix-dashboard/deploys/60cedf94464b380007ead5d2

😎 Browse the preview: https://deploy-preview-1898--apisix-dashboard.netlify.app

[codecov-commenter]

Codecov Report

Merging #1898 (c1d715f) into master (e3debe5) will decrease coverage by 2.96%.
The diff coverage is n/a.

❗ Current head c1d715f differs from pull request most recent head 6d94496. Consider uploading reports for the commit 6d94496 to get more accurate results

@@            Coverage Diff             @@
##           master    #1898      +/-   ##
==========================================
- Coverage   66.91%   63.95%   -2.97%     
==========================================
  Files         179      122      -57     
  Lines        6537     3154    -3383     
  Branches      753      753              
==========================================
- Hits         4374     2017    -2357     
+ Misses       1897     1137     -760     
+ Partials      266        0     -266     

Flag	Coverage Δ
backend-e2e-test	?
backend-e2e-test-ginkgo	?
backend-unit-test	?
frontend-e2e-test	63.95% <ø> (-0.07%)	⬇️

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

Impacted Files	Coverage Δ
web/src/helpers.tsx	68.85% <0.00%> (-3.28%)	⬇️
api/internal/core/store/validate_mock.go
api/internal/handler/migrate/migrate.go
api/internal/utils/runtime/runtime.go
api/internal/utils/consts/api_error.go
api/internal/core/migrate/conflict.go
api/internal/core/migrate/dataset.go
api/internal/handler/schema/plugin.go
api/internal/handler/ssl/ssl.go
api/internal/handler/tool/tool.go
... and 46 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e3debe5...6d94496. Read the comment docs.

[bisakhmondal]

Thanks, Mr. Das :)

[iamayushdas]

LGTM

[nic-chen]

@starsz please have a look.