Update sensory feedback impact payload handling

[Kyle-Ye]

Summary

• Split impact feedback intensity out of SensoryFeedback.FeedbackType into a separate payload.
• Reuse UIKit feedback generators by feedback type while applying impact intensity at generation time.
• Keep the existing FeedbackRequestContext.implementation(type:) entry point while routing UIKit feedback setup through the full SensoryFeedback value.

Motivation

Impact feedback generator style and impact intensity are separate concerns. Keying the UIKit feedback cache by a type that includes intensity can create extra generator entries for the same style. This update keeps the cache keyed by feedback type and carries intensity through the feedback payload instead.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 13.84%. Comparing base (34f1c0c) to head (a5cd59d).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...View/Control/SensoryFeedback/SensoryFeedback.swift	0.00%	5 Missing ⚠️
...rol/SensoryFeedback/SensoryFeedbackGenerator.swift	0.00%	3 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (34f1c0c) and HEAD (a5cd59d). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (34f1c0c)	HEAD (a5cd59d)
	2	1

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #913       +/-   ##
===========================================
- Coverage   26.04%   13.84%   -12.20%     
===========================================
  Files         717      674       -43     
  Lines       50566    44284     -6282     
===========================================
- Hits        13168     6132     -7036     
- Misses      37398    38152      +754     

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