Bump @primer/react-octicons to v19.0.1 and update Octicons to use React.forweardRef (re-introducing reverted PRs)

[broccolinisoup]

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[github-actions]

size-limit report 📦

Path	Size
dist/browser.esm.js	101.15 KB (+0.09% 🔺)
dist/browser.umd.js	101.7 KB (+0.11% 🔺)

[broccolinisoup]

I am closing this in favor of #3437