Update icons to RH brand icons [react] — completed migrations

[nicolethoen]

Summary

Initial pass of replacing legacy FA icons with RH brand equivalents in patternfly-react. The following icon migrations have been completed:

Completed Migrations

• ExternalLinkSquareAltIcon → RhUiExternalLinkFillIcon (chore(ExternalLinkSquareAltIcon): Replace all usages of ExternalLinkSquareAltIcon with RhUiExternalLinkFillIcon #12366)
• QuestionCircleIcon → RhUiQuestionMarkCircleFillIcon (chore(QuestionCircleIcon): Replace all usages of QuestionCircleIcon with RhUiQuestionMarkCircleFillIcon #12370)
• StarIcon / OutlinedStarIcon → RH brand star icons (chore(Star Icons): Replace all star FA icons with RH brand star icons #12371)
• EmptyState test icons → RH brand icons (chore(EmptyState): Update use a RH brand icon in tests #12376)
• BlueprintIcon → RhUiBlueprintIcon (chore(BlueprintIcon): Update all uses of BlueprintIcon to use RhUiBlueprintIcon instead #12378)
• OutlinedQuestionCircleIcon → RhUiQuestionMarkCircleIcon (chore(OutlinedQuestionCircleIcon): Update uses of OutlinedQuestionCircleIcon to use RhUiQuestionMarkCircleIcon #12379)

Remaining Work

Remaining icon migrations tracked in separate issues:

• Replace ArrowRightIcon with RhUiCaretRightIcon #12394 — ArrowRightIcon
• Replace CaretDownIcon with RhUiCaretDownIcon #12395 — CaretDownIcon
• Replace PlusCircleIcon with RhUAddCircleFillIcon #12396 — PlusCircleIcon
• Replace BarsIcon with RhUiMenuBarsIcon #12397 — BarsIcon
• Replace AngleDoubleLeftIcon with RhUiDoubleCaretLeftIcon #12398 — AngleDoubleLeftIcon
• Replace legacy infrastructure and file icons with RH brand icons #12399 — Infrastructure & file icons (23)
• Replace legacy editor, calendar, and people icons with RH brand icons #12400 — Editor, calendar & people icons (27)
• Replace legacy layout, brand, and miscellaneous icons with RH brand icons #12401 — Layout, brand & misc icons (28)

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Jira Issue: PF-3558