fix: deprecate go1.x for provided.al2

Author: obs-gh-abhishekrao

templates/lambda.yaml

@@ -122,7 +122,7 @@ Resources:
       Code:
         S3Bucket: !FindInMap [RegionMap, !Ref 'AWS::Region', BucketName]
         S3Key: !Sub 'lambda/observer/${Version}.zip'
-      Runtime: go1.x
+      Runtime: provided.al2
       MemorySize: !Ref MemorySize
       Timeout: !Ref Timeout
       ReservedConcurrentExecutions: !If