Simplify vale rules

What does this MR do?

While looking into our vale rules, I realized there's some duplication in our rules, and some rules can be simplified. We should also add some exclusions to reduce the number of warnings on some pages.

• All the inclusive language rules have the same message, so might as well combine them all into one for easier management.
• The outdated versions rule could be done with one simple regex, so let's clean that up.
• Several pages list historical changes and likely won't have the old versions removed, so let's add the exclusion rules there to reduce the false positives.
• doc/.vale/gitlab/Normal.yml has the same message as the substitution warning rule, so let's just keep it in there.

Related issues

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