Rename MSOP-8-1EP_3x3mm_P0.65mm_EP1.68x1.88mm, some other minor changes

The 3D model already exists under the new name.

Regenerated model submitted under kicad-packages3D!970 (merged).

When reviewing the related MR !108 (closed) I discovered that the 3D model already exists.

• The model itself was renamed in kicad-packages3D!236 (merged), but the name inside the generator was stuck at the old value. (Maybe other models from that move would need a check as well.)
• The original datasheet http://cds.linear.com/docs/en/packaging/05081662_K_MS8E.pdf redirects to a new location, so I swapped it for the redirect.
• I adjusted A2 to match the value specified in the datasheet.
• tb_s should be 0 according to my understanding when I look at the sketch, but there's a bug preventing setting it to 0: #14 (closed). Then again, according to some picture in https://eu.mouser.com/ProductDetail/Analog-Devices/LTC4440EMS8E?qs=hVkxg5c3xu%252BhcSOCJdx9Zg%3D%3D (if it is an actual picture), maybe it is not really 0 after all. No clue.
• I changed the diameter of pin marker to somewhat match the sketches, but I'm not sure about that; it might possibly be better to revert that one.