Reduce certain rule severities in test projects

test/.editorconfig

@@ -26,3 +26,15 @@ dotnet_diagnostic.CA1303.severity = none
 
 # CS1591: Missing XML comment for publicly visible type or member
 dotnet_diagnostic.CS1591.severity = silent
+
+# CA1707: Identifiers should not contain underscores
+dotnet_diagnostic.CA1707.severity = silent
+
+# CA1062: Validate arguments of public methods
+dotnet_diagnostic.CA1062.severity = suggestion
+
+# CA1063: Implement IDisposable Correctly
+dotnet_diagnostic.CA1063.severity = silent
+
+# CA1816: Dispose methods should call SuppressFinalize
+dotnet_diagnostic.CA1816.severity = silent