TreeTable: selected rows are not highlighted

[ddzieduch]

Describe the bug

The rows selected using checkbox selection should be highlighted like DataTable component.
Functionality was added #5372 and #5703, and then accidentally removed again in 10.6.0 in this PR #6241.

Reproducer

No response

System Information

System:
    OS: macOS 15.1
    CPU: (10) x64 Apple M2 Pro
    Memory: 45.16 MB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.11.1 - ~/.nvm/versions/node/v20.11.1/bin/node
    npm: 10.2.4 - ~/.nvm/versions/node/v20.11.1/bin/npm
  Browsers:
    Brave Browser: 130.1.71.118
    Chrome: 130.0.6723.92
    Edge: 114.0.1823.51
    Safari: 18.1
  npmPackages:
    primereact: ^10.8.3 => 10.8.3 
    react: ^18.3.1 => 18.3.1

Steps to reproduce the behavior

No response

Expected behavior

Restore functionality.