Excludes dhs region organization selections

[jayjaybunce]

🗣 Description

• Filters any dhs region organizations out of the organization search and selection as well as from the initial filters we populate on page load.
• This provides a better first view for these users as they will be presented with their region 3 data rather than an empty dashboard

💭 Motivation and context

🧪 Testing

✅ Pre-approval checklist

• This PR has an informative and human-readable title.
• Changes are limited to a single goal - eschew scope creep!
• All future TODOs are captured in issues, which are referenced
  in code comments.
• All relevant type-of-change labels have been added.
• I have read the CONTRIBUTING document.
• These code changes follow cisagov code standards.
• All relevant repo and/or project documentation has been updated
  to reflect the changes in this PR.
• Tests have been added and/or modified to cover the changes in this PR.
• All new and existing tests pass.

✅ Pre-merge checklist

• Revert dependencies to default branches.
• Finalize version.

✅ Post-merge checklist

• Create a release.

[cduhn17]

LGTM

[cduhn17]

LGTM

[ameliav]

Working for me. I assigned myself to an organization called DHS Region 3 and I couldn't find it in the organization search.

[hawkishpolicy]

How important is the "c" missing in exclude in refinedOrgs at Line 102?

[hawkishpolicy]

I replicated what Amelia did:

• Added an org named dhs region 3 and it does not show up.
• Commented out the new exclusion and it does show up.

LGTM.

[ameliav]

Actually, I found an issue.

The domains and vulnerabilities table is now showing no entries if your default org is "DHS Region x"

[ameliav]

LGTM 👍