You can add a condition on capabilities in order to exclude the admin from the unset action for example

    add_filter( 'post_row_actions', 'remove_row_actions', 10, 1 );
    function remove_row_actions_staff( $actions ){
      //This line stop function execution if user has some admin capabilities 
	  if( current_user_can( 'edit_users' ) ):
		return;
       endif; 
  
	  if( get_post_type() === 'wiki-testimonials' )
		unset( $actions['view'] );
		unset( $actions['edit'] );
	  return $actions;
    }