Rename component sizes

[connor-baer]

Purpose

I renamed the Button sizes in #2307. Four other components use the same old naming scheme. For consistency, their size values should be renamed as well.

Approach and changes

Rename the following size values (medium is always the default):

• Avatar: giga → small, yotta → medium
• ProgressBar: byte → small, kilo → medium, mega → large
• SelectorGroup: kilo → small, mega → medium, flexible (unchanged)
• Spinner: byte → small, kilo → medium, giga → large

Definition of done

• Development completed
• Reviewers assigned
• Unit and integration tests
• Meets minimum browser support
• Meets accessibility requirements

[changeset-bot]

🦋 Changeset detected

Latest commit: 9e23491

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

Name	Type
@sumup/circuit-ui	Minor
@sumup/eslint-plugin-circuit-ui	Major
@sumup/astro-template-circuit-ui	Patch
@sumup/remix-template-circuit-ui	Patch

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Name	Status	Preview	Comments	Updated (UTC)
oss-circuit-ui	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 30, 2023 2:35pm

[codecov]

Codecov Report

Merging #2311 (9e23491) into canary (a51de39) will decrease coverage by 0.09%.
The diff coverage is 80.64%.

Additional details and impacted files

@@            Coverage Diff             @@
##           canary    #2311      +/-   ##
==========================================
- Coverage   97.06%   96.98%   -0.09%     
==========================================
  Files         251      251              
  Lines       20062    20170     +108     
  Branches     1263     1263              
==========================================
+ Hits        19474    19562      +88     
- Misses        574      596      +22     
+ Partials       14       12       -2     

Files	Coverage Δ
packages/circuit-ui/components/Button/Button.tsx	90.08% <100.00%> (-0.17%)	⬇️
...ckages/circuit-ui/components/Carousel/Carousel.tsx	99.55% <100.00%> (ø)
...cuit-ui/components/SelectorGroup/SelectorGroup.tsx	97.34% <100.00%> (ø)
.../circuit-ui/components/ProgressBar/ProgressBar.tsx	93.95% <86.48%> (-2.02%)	⬇️
...ckages/circuit-ui/components/Selector/Selector.tsx	95.51% <85.71%> (-1.94%)	⬇️
packages/circuit-ui/components/Spinner/Spinner.tsx	93.33% <88.09%> (-6.67%)	⬇️
packages/circuit-ui/components/Avatar/Avatar.tsx	87.24% <60.52%> (-1.99%)	⬇️