Reduce dom elements - Approach #1

[Archit101967]

Description

Remove three div from FixedDataTableCellGroup and FixedDataTableRow -> The first div was the wrapper div for the Cell group . -> The second div was the wrapper div for the Row . -> The third div was for row layout

Motivation and Context

-> For optimising the performance of fixed-data-table-2

How Has This Been Tested?

-> Tested using our local examples and performance dev tools

Screenshots (if appropriate):

-> First screenshot is of div_removal
-> Second screenshot is of column_virtualization

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.