Defaulting SwtAuthenticationEnabled to False

[mathewc]

Changing the default for this hosting config. I've already configured this to False on nearly all public stamps, so now's the time to flip the default.

I'll be backporting this to v3/v1 as well as in-proc.

Pull request checklist

IMPORTANT: Currently, changes must be backported to the in-proc branch to be included in Core Tools and non-Flex deployments.

• Backporting to the in-proc branch is not required
  • In-proc backport: Defaulting SwtAuthenticationEnabled to False #10195
• My changes do not require documentation changes
  • Otherwise: Documentation issue linked to PR
• My changes should not be added to the release notes for the next release
  • Otherwise: I've added my notes to release_notes.md
• My changes do not need to be backported to a previous version
  • v3 backport: Defaulting SwtAuthenticationEnabled to False #10196
  • v1 backport: Defaulting SwtAuthenticationEnabled to False #10197
• My changes do not require diagnostic events changes
  • Otherwise: I have added/updated all related diagnostic events and their documentation (Documentation issue linked to PR)
• I have added all required tests (Unit tests, E2E tests)