Replace legacy editor, calendar, and people icons with RH brand icons

[nicolethoen]

Summary

Replace remaining legacy FA text/editor, calendar/time, view, and people icon components with their RH brand equivalents.

Icons (27)

• AlignCenterIcon

• AlignLeftIcon

• AlignRightIcon

• EditIcon

• FontIcon

• PencilAltIcon

• CopyIcon

• OutlinedCopy

• ClipboardIcon

• LinkIcon

• BullhornIcon

• FlagIcon

• InProgressIcon

• PendingIcon

• CalendarIcon

• CalendarAltIcon

• OutlinedCalendarAltIcon

• ClockIcon

• OutlinedClockIcon

• EyeIcon

• EyeSlashIcon

• MoonIcon

• GlobeIcon

• HandPaperIcon

• UserIcon

• UsersIcon

• WalkingIcon

Acceptance Criteria

• All listed icon imports replaced with RH brand equivalents

• No broken links or references as a result of changes

• Tests pass

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Jira Issue: PF-4090

[coderabbitai]

🔗 Related PRs

#12334 - chore(docs): Updated remaining TimesIcon to RhMicronsCloseIcon [merged]
#12371 - chore(Star Icons): Replace all star FA icons with RH brand star icons [merged]
#12376 - chore(EmptyState): Update use a RH brand icon in tests [merged]
#12379 - chore(OutlinedQuestionCircleIcon): Update uses of OutlinedQuestionCircleIcon to use RhUiQuestionMarkCircleIcon [merged]
#12387 - feat: update rhds icons to 2.2.0 [merged]

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