patch 9.1.0554: :bw leaves jumplist and tagstack data around

patch 9.1.0554: :bw leaves jumplist and tagstack data around

Problem:  :bw leaves jumplist and tagstack data around
          (Paul "Joey" Clark)
Solution: Wipe jumplist and tagstack references to the wiped buffer
          (LemonBoy)

As documented the :bwipeout command brutally deletes all the references
to the buffer, so let's make it delete all the entries in the jump list
and tag stack referring to the wiped-out buffer.

fixes: #8201
closes: #15185

Signed-off-by: LemonBoy <thatlemon@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>