fix(RewriteRule): do not redirect for archive or English docs

[erisu]

Motivation and Context

Fix redirect for archived docs

Description

Updated the RewriteRules to follow these steps, in order:

1. Stop rewrite when URL starts with /archive/.
2. Stop rewrite when URL starts with /docs/en/.
3. Forward non-English docs to English docs.

Additional Notes:

• Step three has always been designed to redirect old language documentation to the English version.
  • However, it is possible to change this behavior to redirect them to the archived language documentation instead, if preferred. (Would be in a separate PR)
  • However, since this redirection behavior has been in place for several years, changing it now may no longer be necessary.
• If old versions of the English documentation are to be archived, the RewriteRule should be placed above step two. In this case, it would redirect to archive.

Testing

Ran a httpd server to test the RewriteRules.

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary

[breautek]

lgtm