feat(cnsl): docs link can be customized and custom button is available (#7840)

* feat: customize doc link and additional custom link

* feat: add e2e tests

* fix: update docs

* fix: add @peintnermax changes about cache

* fix: golangci-lint complains preparation.PrepareCommands

---------

Co-authored-by: Max Peintner <max@caos.ch>

e2e/cypress/support/api/external-links-settings.ts

@@ -0,0 +1,32 @@
+import { ensureSetting } from './ensure';
+import { API } from './types';
+
+export function ensureExternalLinksSettingsSet(api: API, tosLink: string, privacyPolicyLink: string, docsLink: string) {
+  return ensureSetting(
+    api,
+    `${api.adminBaseURL}/policies/privacy`,
+    (body: any) => {
+      const result = {
+        sequence: body.policy?.details?.sequence,
+        id: body.policy.id,
+        entity: null,
+      };
+
+      if (
+        body.policy &&
+        body.policy.tosLink === tosLink &&
+        body.policy.privacyLink === privacyPolicyLink &&
+        body.policy.docsLink === docsLink
+      ) {
+        return { ...result, entity: body.policy };
+      }
+      return result;
+    },
+    `${api.adminBaseURL}/policies/privacy`,
+    {
+      tosLink,
+      privacyLink: privacyPolicyLink,
+      docsLink,
+    },
+  );
+}