Backport from 12.0, commit : 1b753b0d53
note: there was also report of PDF content blocking that when indexed
blocked an instance worker indefinitely
Since PyPDF2 gives bad results for PDF indexing, stop using it since it
raises more issues than it helps users.
opw-2044679
closes odoo/odoo#35310
closes odoo/odoo#35525
Signed-off-by: Jorge Pinna Puissant (jpp) <jpp@odoo.com>