[backport rh-test] fix: set transparent border for gradient subscribe button (#6512)

Backport of #6510 to `rh-test`

Automatically created by backport workflow.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6512-backport-rh-test-fix-set-transparent-border-for-gradient-subscribe-button-29e6d73d36508139b5ede16bc23c644c)
by [Unito](https://www.unito.io)

Co-authored-by: Christian Byrne <cbyrne@comfy.org>
Co-authored-by: Christian Byrne <chrbyrne96@gmail.com>

src/platform/cloud/subscription/components/SubscribeToRun.vue

@@ -13,6 +13,13 @@
       background: 'var(--color-subscription-button-gradient)',
       color: 'var(--color-white)'
     }"
+    :pt="{
+      root: {
+        style: {
+          borderColor: 'transparent'
+        }
+      }
+    }"
     data-testid="subscribe-to-run-button"
     @click="handleSubscribeToRun"
   />