[Windows] Subscribe less pointer events in UpdatingGestureRecognizers

[MartyIX]

Description of Change

The idea of the PR is simple. There two sets of pointer event subscriptions:

maui/src/Controls/src/Core/Platform/GestureManager/GesturePlatformManager.Windows.cs

Lines 792 to 796 in fcabff1

	_container.PointerEntered += OnPgrPointerEntered;
	_container.PointerExited += OnPgrPointerExited;
	_container.PointerMoved += OnPgrPointerMoved;
	_container.PointerPressed += OnPgrPointerPressed;
	_container.PointerReleased += OnPgrPointerReleased;

and

maui/src/Controls/src/Core/Platform/GestureManager/GesturePlatformManager.Windows.cs

Lines 824 to 827 in fcabff1

	_container.PointerPressed += OnPointerPressed;
	_container.PointerExited += OnPointerExited;
	_container.PointerReleased += OnPointerReleased;
	_container.PointerCanceled += OnPointerCanceled;

Consequently, _container.PointerPressed, _container.PointerExited, and _container.PointerReleased are subscribed twice. And this PR removes these subscriptions.

Performance impact

• MAIN: Maui.Controls.Sample.Sandbox.exe_20240601_222830.speedscope.MAIN.json
• PR: Maui.Controls.Sample.Sandbox.exe_20240601_223130.speedscope.PR.json

-> ~25% improvement

Issues Fixed

Contributes to #21787

[dotnet-policy-service]

Hey there @MartyIX! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[jsuarezruiz]

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