feat(ProgressBar): Convert ProgressBar to CSS modules behind team feature flag

[TylerJDev]

Closes https://github.com/github/primer/issues/4304

Changelog

New

• Converts ProgressBar to CSS modules behind team feature flag

Rollout strategy

• Patch release
• Minor release
• Major release; if selected, include a written rollout or migration plan
• None; if selected, include a brief description as to why

Testing & Reviewing

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Storybook)
• Changes are SSR compatible
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge
• (GitHub staff only) Integration tests pass at github/github (Learn more about how to run integration tests)

[changeset-bot]

🦋 Changeset detected

Latest commit: a7161a5

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

This PR includes changesets to release 1 package

Name	Type
@primer/react	Minor

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

👋 Hi, this pull request contains changes to the source code that github/github depends on. If you are GitHub staff, we recommend testing these changes with github/github using the integration workflow. Thanks!

[github-actions]

size-limit report 📦

Path	Size
packages/react/dist/browser.esm.js	100.62 KB (+0.23% 🔺)
packages/react/dist/browser.umd.js	100.93 KB (+0.12% 🔺)

[primer-integration]

👋 Hi from github/github! Your integration PR is ready: https://github.com/github/github/pull/351565

[primer-integration]

🔴 golden-jobs completed with status failure.

[jonrohan]

Something we're doing for the data- attribute selectors is wrapping in :where() which brings the specificity down on the selector so it's easier to override in dotcom.

Suggested change

	&[data-progress-display='inline'] {
	&:where([data-progress-display='inline']) {

[jonrohan]

Looks great 👍🏻