Add pgAdmin to PsotgreSQL (#1736)

* Add pgAdmin pt PsotgreSQL

* Update manifests/PostgreSQL/pgAdmin/4.22.0.0.yaml

I am still unable to validate locally. 

Manifest Warning: Silent and SilentWithProgress switches are not specified for InstallerType exe. Please make sure the installer can run unattended.
Manifest Error: Duplicate installer entry found.

Co-authored-by: MarNicGit <47538428+MarNicGit@users.noreply.github.com>

* Update manifests/PostgreSQL/pgAdmin/4.22.0.0.yaml

Ugh, I saw that in the spec and thought it was a typo. That all validates and installs locally now. Sorry to bug you I was going crazy.

Co-authored-by: MarNicGit <47538428+MarNicGit@users.noreply.github.com>

Co-authored-by: awalter <awalter@jonespayne.com>
Co-authored-by: MarNicGit <47538428+MarNicGit@users.noreply.github.com>

manifests/PostgreSQL/pgAdmin/4.22.0.0.yaml

@@ -0,0 +1,20 @@
+Id: PostgreSQL.pgAdmin
+Name: pgAdmin4
+AppMoniker: pgAdmin
+Version: 4.22.0.0
+Publisher: The PostgreSQL Global Development Group
+Author: The PostgreSQL Global Development Group
+License: The PostgreSQL Licence
+LicenseUrl: https://www.pgadmin.org/licence/
+MinOSVersion: 10.0.0.0
+Description: Open Source administration and development platform for PostgreSQL
+Homepage: https://www.pgadmin.org/
+Tags: "pgsql, sql, postgre"
+InstallerType: exe
+Installers:
+ - Arch: x86
+   Url: https://ftp.postgresql.org/pub/pgadmin/pgadmin4/v4.22/windows/pgadmin4-4.22-x86.exe
+   Sha256: E219BB89752448A1599B7D52CD71E2EE6600D1E63508EFBC9409D109A5A86927 
+   Switches:
+     Silent: /verysilent
+     SilentWithProgress: /verysilent