org-export: Remove `:genealogy', introduce `:ignore-list'

org-export: Remove `:genealogy', introduce `:ignore-list'

* EXPERIMENTAL/org-e-ascii.el (org-e-ascii--current-text-width,
  org-e-ascii-item, org-e-ascii-paragraph): Apply `:genealogy' removal.
* EXPERIMENTAL/org-e-latex.el (org-e-latex-item): Apply `:genealogy'
  removal.
* contrib/lisp/org-element.el (org-element-map): Do not compile
  genealogy.  Also use `:ignore-list' when possible.
* contrib/lisp/org-export.el (org-export-collect-tree-properties):
  Populate `:ignore-list' before starting to transcode each element in
  subtree.
(org-export-get-min-level): Use `:ignore-list'.
(org-export--skip-p): Renamed from `org-export-skip-p'.  This is now
an internal function.
(org-export-data): Use and update `:ignore-list'.  Do not update
genealogy.
(org-export-ignore-element): New function
(org-export-last-sibling-p): Small refactoring.
(org-export-resolve-fuzzy-link): Apply `:genealogy' removal.
(org-export-get-genealogy): Use a more efficient algorithm.

The equivalent of (plist-get info :genealogy) is
now (org-export-get-genealogy blob info), blob being any element or
object.