Update Vulnerability when Finding is updated

What does this MR do?

Related to #214987 (closed)

This MR changes the logic responsible for creating Vulnerability objects in database. Introduced changes adds new behavior to update findings/scanners/identifiers/vulnerabilities when we are pipeline completes on default branch.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers
• [-] Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• [-] Label as security and @ mention @gitlab-com/gl-security/appsec
• [-] The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• [-] Security reports checked/validated by a reviewer from the AppSec team

ee/app/services/security/store_report_service.rb

@@ -36,10 +36,15 @@ def create_all_vulnerabilities!
     end
 
     def create_vulnerability_finding(occurrence)
-      vulnerability_finding = create_or_find_vulnerability_finding(occurrence)
+      vulnerability_params = occurrence.to_hash.except(:compare_key, :identifiers, :location, :scanner)
+      vulnerability_finding = create_or_find_vulnerability_finding(occurrence, vulnerability_params)
+
+      update_vulnerability_scanner(occurrence)
+
+      update_vulnerability_finding(vulnerability_finding, vulnerability_params)
 
       occurrence.identifiers.map do |identifier|
-        create_vulnerability_identifier_object(vulnerability_finding, identifier)
+        create_or_update_vulnerability_identifier_object(vulnerability_finding, identifier)
       end
 
       create_vulnerability_pipeline_object(vulnerability_finding, pipeline)
@@ -48,16 +53,13 @@ def create_vulnerability_finding(occurrence)
     end
 
     # rubocop: disable CodeReuse/ActiveRecord
-    def create_or_find_vulnerability_finding(occurrence)
+    def create_or_find_vulnerability_finding(occurrence, create_params)
       find_params = {
         scanner: scanners_objects[occurrence.scanner.key],
         primary_identifier: identifiers_objects[occurrence.primary_identifier.key],
         location_fingerprint: occurrence.location.fingerprint
       }
 
-      create_params = occurrence.to_hash
-        .except(:compare_key, :identifiers, :location, :scanner)
-
       begin
         project
           .vulnerability_findings
@@ -69,23 +71,35 @@ def create_or_find_vulnerability_finding(occurrence)
         Gitlab::ErrorTracking.track_and_raise_exception(e, create_params: create_params&.dig(:raw_metadata))
       end
     end
-    # rubocop: enable CodeReuse/ActiveRecord
 
-    def create_vulnerability_identifier_object(vulnerability_finding, identifier)
-      vulnerability_finding.occurrence_identifiers.find_or_create_by!( # rubocop: disable CodeReuse/ActiveRecord
-        identifier: identifiers_objects[identifier.key])
+    def update_vulnerability_scanner(occurrence)
+      scanner = scanners_objects[occurrence.scanner.key]
+      scanner.update(occurrence.scanner.to_hash)
+    end
+
+    def update_vulnerability_finding(vulnerability_finding, update_params)
+      vulnerability_finding.update(update_params)
+    end
+
+    def create_or_update_vulnerability_identifier_object(vulnerability_finding, identifier)
+      identifier_object = identifiers_objects[identifier.key]
+      vulnerability_finding.occurrence_identifiers.find_or_create_by!(identifier: identifier_object)
+      identifier_object.update(identifier.to_hash)
     rescue ActiveRecord::RecordNotUnique
     end
 
     def create_vulnerability_pipeline_object(vulnerability_finding, pipeline)
-      vulnerability_finding.occurrence_pipelines.find_or_create_by!(pipeline: pipeline) # rubocop: disable CodeReuse/ActiveRecord
+      vulnerability_finding.occurrence_pipelines.find_or_create_by!(pipeline: pipeline)
     rescue ActiveRecord::RecordNotUnique
     end
+    # rubocop: enable CodeReuse/ActiveRecord
 
     def create_vulnerability(vulnerability_finding, pipeline)
-      return if vulnerability_finding.vulnerability_id
-
-      Vulnerabilities::CreateService.new(vulnerability_finding.project, pipeline.user, finding_id: vulnerability_finding.id).execute
+      if vulnerability_finding.vulnerability_id
+        Vulnerabilities::UpdateService.new(vulnerability_finding.project, pipeline.user, finding: vulnerability_finding).execute(vulnerability_finding.vulnerability)
+      else
+        Vulnerabilities::CreateService.new(vulnerability_finding.project, pipeline.user, finding_id: vulnerability_finding.id).execute
+      end
     end
 
     def scanners_objects