Make DSA method of redress configurable

[nick-funk]

What does this PR do?

• Makes the DSA method of redress configurable under Admin > Config > General > DSA.
• Shows method of redress under the notifications tab stream side.

These changes will impact:

• [x] commenters
• [x] moderators
• [x] admins
• [ ] developers

What changes to the GraphQL/Database Schema does this PR introduce?

Adds the configurable MethodOfRedress type to the DSAConfig.

Does this PR introduce any new environment variables or feature flags?

No

If any indexes were added, were they added to INDEXES.md?

No new indices.

How do I test this PR?

• If you previously enabled DSA, you need to modify your tenant with the following
  • The old format of:

      "dsa": {
        "enabled": true,
        "methodOfRedress": "NONE"
      },

  • Needs to be changed to:

     "dsa": {
      "enabled": true,
      "methodOfRedress": {
        "method": "NONE",
      }
    },

• Go to Admin > Config > General > DSA, enable DSA, and select a method of redress
  • Select and fill in fields for URL or Email if you choose them, see that they validate for a proper URL/email
• Head to notifications tab stream side
• See that there is a light blue method of redress callout above your notification items

Where any tests migrated to React Testing Library?

No

How do we deploy this PR?

No special considerations.

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