help-beta: Use CORPORATE_ENABLED instead of SHOW_BILLING_HELP_LINKS.

We should use the generic name of the env variable since we intend to
use it in places without the billing help links context.

help-beta/astro.config.mjs

@@ -45,7 +45,7 @@ export default defineConfig({
                 optional: true,
                 default: true,
             }),
-            SHOW_BILLING_HELP_LINKS: envField.boolean({
+            CORPORATE_ENABLED: envField.boolean({
                 context: "client",
                 access: "public",
                 optional: true,

help-beta/src/components/NavigationSteps.astro

@@ -1,7 +1,7 @@
 ---
 import assert from "node:assert";
 
-import {SHOW_BILLING_HELP_LINKS, SHOW_RELATIVE_LINKS} from "astro:env/client";
+import {CORPORATE_ENABLED, SHOW_RELATIVE_LINKS} from "astro:env/client";
 
 /* eslint-disable import/extensions */
 import RawZulipIconBarChart from "~icons/zulip-icon/bar-chart?raw";
@@ -22,6 +22,7 @@ import RawZulipIconUserGroupCog from "~icons/zulip-icon/user-group-cog?raw";
 
 const PERSONAL_SETTINGS_TYPE = "Personal settings";
 const ORGANIZATION_SETTINGS_TYPE = "Organization settings";
+const SHOW_BILLING_HELP_LINKS = CORPORATE_ENABLED;
 
 // This list has been transformed one-off from `help_settings_links.py`, we
 // have added a comment in that file to update this list in case of any