fix(tooltip): force close shared tooltip when hovering another target - 20.1.x

[RivaIvanova]

Closes #16288

Additional information (check all that apply):

• Bug fix
• New functionality
• Documentation
• Demos
• CI/CD

Checklist:

• All relevant tags have been applied to this PR
• This PR includes unit tests covering all the new code (test guidelines)
• This PR includes API docs for newly added methods/properties (api docs guidelines)
• This PR includes feature/README.MD updates for the feature docs
• This PR includes general feature table updates in the root README.MD
• This PR includes CHANGELOG.MD updates for newly added functionality
• This PR contains breaking changes
• This PR includes ng update migrations for the breaking changes (migrations guidelines)
• This PR includes behavioral changes and the feature specification has been updated with them

[Copilot]

Pull Request Overview

This PR fixes a bug where shared tooltips weren't properly closing when hovering over another target, addressing issue #16288. The fix ensures that when a single tooltip is used across multiple targets, it immediately closes for the previous target when hovering over a new one.

Key changes:

• Refactored the stopAnimations method to remove the force parameter and simplified its functionality
• Added a new forceClose method to handle immediate tooltip closure with proper animation handling
• Updated the tooltip target directive to use the new forceClose method instead of stopAnimations

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
tooltip.directive.ts	Refactored animation handling and added forceClose method for immediate tooltip closure
tooltip-target.directive.ts	Updated to use forceClose method when switching between targets
tooltip.directive.spec.ts	Added test case for tooltip positioning when no close animation is present

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