Make SyntaxError when mixing except/except* point to the offending clause #99211

After #99160, the SyntaxError points to the try keyword, but I think it would be relatively easy to make it point to the except or except* (whichever one is responsible for the SyntaxError) by extracting different alternatives. Do you think that pointing to the try is good enough? @iritkatriel @pablogsal

• PR: gh-99211: Point to except/except* on syntax errors when mixing them #99215

• PR: [3.11] gh-99211: Point to except/except* on syntax errors when mixing them (GH-99215) #99622