NR-301930: Create a placeholder when entity is not found (#1726)

* Create Relationship with APM and Lambda Function and Lambda Function Alias

* remove lambda function alias from synthesis definition file

* Updated the regex

* Addressed linter issue

* Addressed linter issue

* Addressed linter issue

* Addressed review comments

---------

Co-authored-by: sravyaparsi <[email protected]>
Co-authored-by: nr-sparsi <[email protected]>
Co-authored-by: Otávio Carvalho <[email protected]>

relationships/candidates/AWSLAMBDAALIAS.yml

@@ -0,0 +1,16 @@
+category: AWSLAMBDAALIAS
+lookups:
+  - entityTypes:
+      - domain: INFRA
+        type: AWSLAMBDAFUNCTIONALIAS
+    tags:
+      matchingMode: ALL
+      predicates:
+        - tagKeys: [ "aws.Arn" ]
+          field: awsLambdaAliasArn
+    onMatch:
+      onMultipleMatches: RELATE_ALL
+    onMiss:
+      action: CREATE_UNINSTRUMENTED
+      uninstrumented:
+        type: AWSLAMBDAALIAS

relationships/candidates/AWSLAMBDAFUNCTION.yml

@@ -3,14 +3,14 @@ lookups:
   - entityTypes:
       - domain: INFRA
         type: AWSLAMBDAFUNCTION
-      - domain: INFRA
-        type: AWSLAMBDAFUNCTIONALIAS
     tags:
       matchingMode: ALL
       predicates:
-        - tagKeys: ["aws.arn","aws.functionArn","aws.lambda.functionArn","aws.Arn"]
+        - tagKeys: ["aws.functionArn","aws.lambda.functionArn"]
           field: awsLambdaArn
     onMatch:
       onMultipleMatches: RELATE_ALL
     onMiss:
-      action: NO_OP
+      action: CREATE_UNINSTRUMENTED
+      uninstrumented:
+        type: AWSLAMBDAFUNCTION

relationships/synthesis/APM-APPLICATION-to-INFRA-LAMBDAALIAS.yml

@@ -0,0 +1,24 @@
+relationships:
+  - name: apmCallsLambdaAlias
+    version: "1"
+    origins:
+      - Distributed Tracing
+    conditions:
+      - attribute: eventType
+        anyOf: [ "Span" ]
+      - attribute: cloud.platform
+        anyOf: [ "aws_lambda"]
+      - attribute: cloud.resource_id
+        regex: "^arn:aws:lambda:([^:]*):([^:]*):function:([^:]*):([^/]*)$"
+    relationship:
+      expires: P75M
+      relationshipType: CALLS
+      source:
+        extractGuid:
+          attribute: entity.guid
+      target:
+        lookupGuid:
+          candidateCategory: AWSLAMBDAALIAS
+          fields:
+            - field: awsLambdaAliasArn
+              attribute: cloud.resource_id