Fix "Don't" relevant typos in core

Problem/Motivation

Discovered at #2972224: Add .cspell.json to automate spellchecking in Drupal core, and pointed by @xjm in https://www.drupal.org/project/drupal/issues/3122088#comment-13628724

+++ b/core/.cspell.json
@@ -0,0 +1,1288 @@
+      "DONT",
...
+      "Dont",
...
+      "don't",

@xjm:

Unless this is French, it should probably be DoNot/DO_NOT in code and Don't or Do not in text. There may be a whole category in here of contractions without their apostrophes.

Proposed resolution

As title and see the change record https://www.drupal.org/node/3122084 for how to work with cspell.

Remaining tasks

Pick out all applicable words from #2972224: Add .cspell.json to automate spellchecking in Drupal core and fix them.

User interface changes

API changes

Data model changes

Release notes snippet