ui5-input- suggestions are announced twice in screen reader #5625

Bug Description

ui5-input with suggestions- suggestions are announced twice in screen reader JAWS/NVDA when navigated through keyboard

Expected Behavior

suggestions should be announced once when it received focus

Steps to Reproduce

1. Access 'https://sap.github.io/ui5-webcomponents/playground/components/Input/' in JAWS
2. Navigate to Section 'Input with Suggestions and Value State message'
3. Enter keyword and navigate suggestions

Context

• UI5 Web Components version: {1.6.0}
• Affected component: {ui5-input}

Log Output / Stack Trace / Screenshots

https://user-images.githubusercontent.com/67934622/182745953-1c7f1c8b-5394-42a3-9704-8f4e3571192b.mp4

Priority

• Low
• Medium
• High
• Very High

The priority indicates the severity of the issue. To set the appropriate priority consider the following criteria:

• Breaks entire application or system - High or Very High
• Accessibility issue - Medium or High
• Functional issue - Medium or High
• Visual issue - Low or Medium

Note: The priority might be re-evaluated by the issue processor.

Stakeholder Info (if applicable)

• Organization: {SuccessFactors}