Fix spellcheck on markdown (#23153)

* Fix spellcheck on markdown

Problem

- There is no way to prevent spellcheck of all Markdown, even for
  generated files with lots of possibly non-English or otherwise
  auto-generated text that generally fails spell check.

Changes

- Add a method using embedded comments to temporarily disable spellcheck
  for blocks of Markdown - Remove `Description` column by default in CHIP
  error table to make it easier to print

Testing done
- CI finds no spell-checking errors.

* Fix spellcheck some more

Author: tcarmelveilleux

.spellcheck.yml

@@ -61,6 +61,6 @@ matrix:
       # converts markdown to HTML
       - pyspelling.filters.markdown:
     sources:
-      - '**/*.md|!third_party/**|!examples/common/**/repo/**'
+      - '**/*.md|!third_party/**|!examples/common/**/repo/**|!docs/ERROR_CODES.md'
     aspell:
       ignore-case: true