chore(v9/craft): Use version templating for aws layer (#18676)

Craft now supports mustach-style template variables for versions which
means we no longer have to worry about manually keeping track of the
major in the layer name.

Related: getsentry/craft#678

Closes: #18674

Author: andreiborza

.craft.yml

@@ -146,7 +146,7 @@ targets:
   # AWS Lambda Layer target
   - name: aws-lambda-layer
     includeNames: /^sentry-node-serverless-\d+.\d+.\d+(-(beta|alpha|rc)\.\d+)?\.zip$/
-    layerName: SentryNodeServerlessSDKv9
+    layerName: SentryNodeServerlessSDKv{{{major}}}
     compatibleRuntimes:
       - name: node
         versions: