fix(OutlinedClockIcon): Replace OutlinedClockIcon with RhUiClockIcon

[rebeccaalpert]

What:
This is one piece of #12400. Breaking it up by icon so it is easier to review.

Additional issues:

Summary by CodeRabbit

• Style
  • Updated clock icon styling across TimePicker and DateTimePicker components for visual consistency.
  • Demo examples and documentation reflect the updated icon appearance.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 5e464c03-3ab5-4d19-9ee6-8220dc6f28dc

📥 Commits

Reviewing files that changed from the base of the PR and between 8b528bb and 2e12821.

📒 Files selected for processing (3)

• packages/react-core/src/components/TimePicker/TimePicker.tsx
• packages/react-core/src/demos/DateTimePicker.md
• packages/react-core/src/demos/examples/DateTimePicker/DateTimePicker.tsx

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Walkthrough

This PR replaces the OutlinedClockIcon with RhUiClockIcon across the TimePicker component implementation and its demo examples. The change affects the icon imports and prop assignments in both the core component and the demo documentation.

Changes

Clock icon replacement

Layer / File(s)	Summary
TimePicker component icon update packages/react-core/src/components/TimePicker/TimePicker.tsx	The TimePicker component import statement replaces OutlinedClockIcon with RhUiClockIcon, and the TextInput customIcon prop is updated to render the new icon.
Demo and documentation icon updates packages/react-core/src/demos/examples/DateTimePicker/DateTimePicker.tsx, packages/react-core/src/demos/DateTimePicker.md	The DateTimePicker demo example and documentation are updated to import RhUiClockIcon instead of OutlinedClockIcon, and the MenuToggle icon prop is changed to use the new icon.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested labels

Needs design review

Suggested reviewers

• nicolethoen
• kmcfaul
• thatblindgeye

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: replacing OutlinedClockIcon with RhUiClockIcon across TimePicker, DateTimePicker demo, and related components.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[patternfly-build]

Preview: https://pf-react-pr-12465.surge.sh

A11y report: https://pf-react-pr-12465-a11y.surge.sh