allow field_serializer('*') (fix #8990)

[ornariece]

Change Summary

allow field_serializer('*') for defining a serializer for all fields in a model

Related issue number

fix #8990

Checklist

• The pull request title is a good summary of the changes - it will be used in the changelog
• Unit tests for the changes exist
• Tests pass on CI
• Documentation reflects the changes where applicable
• My PR is ready to review, please add a comment including the phrase "please review" to assign reviewers

Selected Reviewer: @davidhewitt

[codspeed-hq]

CodSpeed Performance Report

Merging #9001 will not alter performance

_{Comparing ornariece:field_serializer_all (707fd47) with main (18d39fe)}

Summary

✅ 10 untouched benchmarks

[ornariece]

please review @sydney-runkle

[sydney-runkle]

Left a bit of feedback. Thanks for your work on this :). And thanks for the tests!

[sydney-runkle]

@ornariece,

Looks great, but please fix the linting errors before we merge!

[ornariece]

turns out the initial doc change was correct 😄

[sydney-runkle]

@ornariece,

Hmm, I don't think it was -- I think you just needed to fix the whitespace... could you try that instead?

[ornariece]

here's to hoping i checked everything properly this time! sorry for the trouble

[sydney-runkle]

No worries at all. Looks great, thanks so much :).