[SVLS-8671] Add Vercel to serverless product dataflows (#3013)

* [SVLS-8671] Add Vercel to serverless product dataflows

* add traces to vercel

Author: nina9753

vercel/assets/dataflows.yaml

@@ -0,0 +1,16 @@
+provides:
+  - id: vercel-metrics
+    always_on: false
+    granular: true
+    data_type: metrics
+    direction: inbound
+  - id: vercel-logs
+    always_on: false
+    granular: true
+    data_type: logs
+    direction: inbound
+  - id: vercel-traces
+    always_on: false
+    granular: true
+    data_type: traces
+    direction: inbound