[Test]: WC TruncatedText test coverage of atleast 80%

[devadula-nandan]

Acceptance criteria

• achieve at least 80% test coverage on TruncatedText web component

[devadula-nandan]

tests being added in feat: truncated text initial commit web component #7397

edit: Patch coverage is at 84.17266%

will check for any opportunity to make it 100%, else we can close by end of sprint. as the acceptance criteria is already met