Add vulnerability management policy type for graphql query

app/assets/javascripts/graphql_shared/possible_types.json

doc/api/graphql/reference/index.md

...pp/finders/security/pipeline_execution_policies_finder.rb

ee/app/finders/security/scan_result_policies_finder.rb

ee/app/finders/security/security_policy_base_finder.rb

...ders/security/vulnerability_management_policies_finder.rb

ee/app/graphql/ee/types/project_type.rb

...graphql/resolvers/concerns/construct_security_policies.rb

...vers/security/vulnerability_management_policy_resolver.rb

...ql/types/security/vulnerability_management_policy_type.rb

...security/vulnerability_management_policies_finder_spec.rb

...security/vulnerability_management_policy_resolver_spec.rb

ee/spec/graphql/types/project_type_spec.rb

...rchestration/vulnerability_management_policy_type_spec.rb

...xamples/finders/security_policies_base_finder_examples.rb

spec/support/finder_collection_allowlist.yml