Mitra/KYC-1852/Update the regex for first and last name validation

[mitra-deriv]

As Backend updated the API to accept 1 character ( due to the Chinese language) we need to update the regex and also as whitespace is accepted and BE accepting 1 space also we should not accept space for the beginning and end of the characters.

[coveralls]

Pull Request Test Coverage Report for Build 9659435480

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
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• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 3 of 3 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.01%) to 99.824%

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Totals
Change from base Build 8921926223:	0.01%
Covered Lines:	567
Relevant Lines:	567

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💛 - Coveralls

[github-actions]

🎉 This PR is included in version 0.0.28 🎉

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