[BUG] - Popover animate in the wrong direction on first open (auto placement)

[AnYiEE]

          @ryo-manba Combined with the reproduction environment provided by Peterl561, it seems that when displaying the initial animation, the animation starts from the `placement` instead of the calculated position. For example, in the reproduction environment, `placement="right"` is specified, but there is no space on the right side, so the content card automatically adjusts to pop out from the left side, but the animation does not change accordingly. For me, I did not specify the `placement`, and the Popover defaults to popping up, but there is no space above, so the content card can only pop down, yet the initial animation still assumes it is popping up.

Originally posted by @AnYiEE in #4251 (comment)

[linear]

ENG-1680 [BUG] - Popover animate in the wrong direction on first open (auto placement)