ci(workflow): update github action default token

[Sarthak-instill]

Because

• we need to update github action default token and remove docker hub login.

This commit

• update github action default token

[linear]

INS-2412 For public repo's PR GA workflow, we don’t need to log in to our Docker Hub.

pinglin said:

engineering For our public repos’ pull request GA workflow, we don’t need to log in to our Docker Hub. The GA secret can’t be exposed to a forked repo anyway. Also, for Codecov GA workflow, we will need to use the GitHub default token here so the pull request from a forked repo branch can also trigger the Codecov GA workflow. sarthak.gupta Can you help update the logic for all repos. Thanks.

<https://github.com/instill-ai/model-backend/blob/main/.github/workflows/coverage.yml | coverage.yml>

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (32bffea) 1.04% compared to head (cebf07b) 1.04%.
Report is 2 commits behind head on main.

❗ Current head cebf07b differs from pull request most recent head 98901ad. Consider uploading reports for the commit 98901ad to get more accurate results

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #442   +/-   ##
=====================================
  Coverage   1.04%   1.04%           
=====================================
  Files         10      10           
  Lines       5373    5373           
=====================================
  Hits          56      56           
  Misses      5309    5309           
  Partials       8       8           

Flag	Coverage Δ
unittests	1.04% <ø> (ø)

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[pinglin]

LGTM