After weeks of will he? or won't he? legal wrangling and posturing, it was decided today that Sumner Redstone will give testimony in the looming trial over who controls his health care and ultimately perhaps who pulls the strings on the approximately $40 billion in corporate assets. “As the only concern of this case is Redstone’s welfare, his appearance is of the utmost significance,” said Judge David Cowan in a tentative ruling Monday. However, the testimony by the…