Add PostgreSQL 12.4.1.yaml (#3390)

* Add PostgreSQL 12.4.1.yaml

* remove SystemAppId

* remove empty properties

* remove more empty properties

* re-trigger checks

* remove more empty properties (local validate didn't complain)

manifests/PostgreSQL/PostgreSQL/12.4.1.yaml

@@ -0,0 +1,18 @@
+Id: PostgreSQL.PostgreSQL
+Name: PostgreSQL
+Version: 12.4.1
+Publisher: The PostgreSQL Global Development Group
+AppMoniker: PostgreSQL
+License: PostgreSQL License
+LicenseUrl: https://www.postgresql.org/about/licence/
+Homepage: https://www.postgresql.org/
+Description: PostgreSQL is a powerful, open source object-relational database system with over 30 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance.
+Tags: database
+Installers:
+- Arch: x64
+  Url: https://get.enterprisedb.com/postgresql/postgresql-12.4-1-windows-x64.exe
+  Sha256: 9A74801F06A484C22EBEE8E0AE7BF6839696BFC307BAD28E122A111883DB3032
+  InstallerType: exe
+  Switches:
+    Silent: --mode unattended
+    SilentWithProgress: --mode unattended --unattendedmodeui minimal