Add sunset notification to popup UI

[lesleyjanenorton]

This PR:

• Adds messaging about the FPN sunset to all panels of the FPN extension
• Changes the badge icon to a persistent warning icon
• Updates the version number to "25.0.0", though this is overwritten somewhere in TaskCluster
• Stops redirecting folks to the exit survey when the extension is uninstalled
• Still negotiating with the tests on my M1. This updates one test but is possibly failing others.

[firefoxci-taskcluster]

Uh oh! Looks like an error! Details

Client ID static/taskcluster/github does not have sufficient scopes and is missing the following scopes:

{
  "AnyOf": [
    "queue:rerun-task:xpi-level-1/QItjqAtVQ2Ky-EWDM-kMkA/dtn12h_4S3qJAulnJu-MWQ",
    "queue:rerun-task-in-project:none",
    {
      "AllOf": [
        "queue:rerun-task",
        "assume:scheduler-id:xpi-level-1/QItjqAtVQ2Ky-EWDM-kMkA"
      ]
    }
  ]
}

This request requires the client to satisfy the following scope expression:

{
  "AnyOf": [
    "queue:rerun-task:xpi-level-1/QItjqAtVQ2Ky-EWDM-kMkA/dtn12h_4S3qJAulnJu-MWQ",
    "queue:rerun-task-in-project:none",
    {
      "AllOf": [
        "queue:rerun-task",
        "assume:scheduler-id:xpi-level-1/QItjqAtVQ2Ky-EWDM-kMkA"
      ]
    }
  ]
}

---

• method: rerunTask
• errorCode: InsufficientScopes
• statusCode: 403
• time: 2023-05-01T17:19:24.021Z

[pdehaan]

I didn't build+run this locally, but code "looks" good.
I can blind R+ if needed, as long as we have Softvision or somebody that can install the add-on and run the gauntlet of tests (Windows, High Contrast, etc).

[lesleyjanenorton]

@pdehaan Softvision will indeed be running the guantlet so if you're comfortable blind R+ing that would be fantastic although actually not entirely necessary since they can use the TaskCluster builds triggered by this PR and locally built XPIs. We're not blocked on merging so your call!

[pdehaan]

:yolo: