Autocomplete: Multi select chips render issue

[prashanthr6383]

Description

References

1. Value Prop now accepts both 
   single-select-type = string
   multiple-select-type = string[]

2. The default value can be assigned for multi-select, provided the value is an array.
   e.g., ['Apple', 'Orange']

3. valueChange event emitter type changed to string | string[].

Fixes #2529 #2528

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

How Has This Been Tested?

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

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[prashanthr6383]

@cjwinsor I have added the test cases now and it is ready for review