ci: Install the matching branch of backend.ai-cli

[jil8885]

Modify following files to add backend.ai-cli module dependency when test push or pull request.

• .github/workflows/default.yml
• requirements/lint.txt
• requirements/test.txt
• requirements/typecheck.txt

[codecov]

Codecov Report

Merging #520 (49ec51f) into main (886d23a) will increase coverage by 0.07%.
The diff coverage is n/a.

❗ Current head 49ec51f differs from pull request most recent head a37644f. Consider uploading reports for the commit a37644f to get more accurate results

@@            Coverage Diff             @@
##             main     #520      +/-   ##
==========================================
+ Coverage   48.38%   48.46%   +0.07%     
==========================================
  Files          53       53              
  Lines        8751     8751              
==========================================
+ Hits         4234     4241       +7     
+ Misses       4517     4510       -7     

Impacted Files	Coverage Δ
src/ai/backend/manager/server.py	59.73% <0.00%> (+1.84%)	⬆️

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