[sitecore-jss-nextjs] Link component prefetches files

[illiakovalenko]

• [x] This PR follows the Contribution Guide
• [x] Changelog updated
• [ ] Upgrade guide entry added

Description / Motivation

We need to render regular React link instead of Next.js link component when relative URL has a file extension

Testing Details

• [x] Unit Test Added
• [x] Manual Test/Other (Please elaborate)

Types of changes

• [x] 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 change)