fix(awsAmplify,vercel): set allow list of formats for providers

[aaharu]

🔗 Linked issue

resolves #1886
resolves #1285
resolves #1365

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Some providers prioritize the value of the Accept HTTP header, causing the format option to fail.
I added the option to set a allowlist for formats in the provider's configuration.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@nuxt/image@1996

commit: 4c0b60b

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 7.03%. Comparing base (6022fa8) to head (4c0b60b).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
src/provider.ts	0.00%	5 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #1996   +/-   ##
=====================================
  Coverage   7.03%   7.03%           
=====================================
  Files         77      77           
  Lines       3567    3567           
  Branches     138     138           
=====================================
  Hits         251     251           
  Misses      3268    3268           
  Partials      48      48           

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[danielroe]

nice work! thank you ❤️