Add Scaleway, Yousign, Railway and Crisp access-review connectors

Four API-key, single-tenant (Pattern 3) connectors:

- Scaleway: secret key in the X-Auth-Token header plus an Organization ID
  setting; GET /iam/v1alpha1/users (owner/member, status, two-factor),
  per-connection BuildProbeURL.
- Yousign: Bearer API key; GET /v3/users (admin/owner/member, is_active);
  production host with a static probe.
- Railway: Bearer account token; GraphQL me{workspaces{members}} aggregated
  and deduplicated across workspaces; custom probe, since Railway returns
  HTTP 200 with an errors body on a rejected token.
- Crisp: plugin token as HTTP Basic (identifier:key) plus a Website ID
  setting and the X-Crisp-Tier header; GET /v1/website/{id}/operators/list,
  custom probe and name resolver.

Scaleway and Crisp carry a required extra setting, so the console add-source
dialog maps organizationId/websiteId onto their scalewayOrganizationId and
crispWebsiteId API-key inputs; without that mapping the value is silently
dropped and the create is rejected.

Cassette-backed driver tests plus unit tests for the cross-workspace
deduplication, the probe contracts and the role/MFA helpers.

Signed-off-by: Aurélien Sibiril <81782+aureliensibiril@users.noreply.github.com>

pkg/accessreview/drivers/testdata/scaleway.yaml

@@ -0,0 +1,37 @@
+---
+version: 2
+interactions:
+    - id: 0
+      request:
+        proto: HTTP/1.1
+        proto_major: 1
+        proto_minor: 1
+        content_length: 0
+        host: api.scaleway.com
+        form:
+            order_by:
+                - created_at_asc
+            organization_id:
+                - 11111111-2222-3333-4444-555555555555
+            page:
+                - "1"
+            page_size:
+                - "100"
+        headers:
+            Accept:
+                - application/json
+        url: https://api.scaleway.com/iam/v1alpha1/users?order_by=created_at_asc&organization_id=11111111-2222-3333-4444-555555555555&page=1&page_size=100
+        method: GET
+      response:
+        proto: HTTP/2.0
+        proto_major: 2
+        proto_minor: 0
+        content_length: -1
+        uncompressed: true
+        body: '{"users":[{"id":"8a3f1b2c-9d4e-4a5f-8b6c-1d2e3f4a5b6c","email":"alice.martin@example.com","username":"alice.martin@example.com","first_name":"Alice","last_name":"Martin","created_at":"2023-04-12T09:15:42.123456Z","organization_id":"11111111-2222-3333-4444-555555555555","last_login_at":"2025-06-20T08:01:33.000000Z","type":"owner","two_factor_enabled":true,"status":"activated","mfa":true,"locked":false},{"id":"c7e2a9d4-5f6b-4c3a-9e8d-2b1c0a9f8e7d","email":"bob.dupont@example.com","username":"bob.dupont@example.com","first_name":"Bob","last_name":"Dupont","created_at":"2024-01-20T16:45:10.000000Z","organization_id":"11111111-2222-3333-4444-555555555555","last_login_at":null,"type":"member","two_factor_enabled":false,"status":"invitation_pending","mfa":false,"locked":false}],"total_count":2}'
+        headers:
+            Content-Type:
+                - application/json
+        status: 200 OK
+        code: 200
+        duration: 100ms