Fix empty string credentials validation issue, increase test coverage of credential validation (#7690) (#846)

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

go.mod

@@ -16,7 +16,7 @@ require (
 	github.com/hashicorp/terraform-json v0.14.0
 	github.com/hashicorp/terraform-plugin-framework v1.1.1
 	github.com/hashicorp/terraform-plugin-sdk/v2 v2.24.0
-	github.com/hashicorp/terraform-provider-google v1.20.1-0.20230411174720-43bfd88e95e1
+	github.com/hashicorp/terraform-provider-google v1.20.1-0.20230411193921-6330964b57d2
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/pkg/errors v0.9.1
 	github.com/sirupsen/logrus v1.8.1

go.sum

@@ -268,8 +268,8 @@ github.com/hashicorp/terraform-plugin-mux v0.8.0 h1:WCTP66mZ+iIaIrCNJnjPEYnVjawT
 github.com/hashicorp/terraform-plugin-mux v0.8.0/go.mod h1:vdW0daEi8Kd4RFJmet5Ot+SIVB/B8SwQVJiYKQwdCy8=
 github.com/hashicorp/terraform-plugin-sdk/v2 v2.24.0 h1:FtCLTiTcykdsURXPt/ku7fYXm3y19nbzbZcUxHx9RbI=
 github.com/hashicorp/terraform-plugin-sdk/v2 v2.24.0/go.mod h1:80wf5oad1tW+oLnbXS4UTYmDCrl7BuN1Q+IA91X1a4Y=
-github.com/hashicorp/terraform-provider-google v1.20.1-0.20230411174720-43bfd88e95e1 h1:ogC1lQYNgSjqePbg/lhedY1XR+IIVNDbjOK1Mud58d4=
-github.com/hashicorp/terraform-provider-google v1.20.1-0.20230411174720-43bfd88e95e1/go.mod h1:K83RkfPnkB7Rv0DW13eFCqSmLPezC+KtAaJjaU+jBb8=
+github.com/hashicorp/terraform-provider-google v1.20.1-0.20230411193921-6330964b57d2 h1:1y4clIg+8YaUQcGqm+9CG8lIPk6Qsz5IJlhbSCMf8vA=
+github.com/hashicorp/terraform-provider-google v1.20.1-0.20230411193921-6330964b57d2/go.mod h1:K83RkfPnkB7Rv0DW13eFCqSmLPezC+KtAaJjaU+jBb8=
 github.com/hashicorp/terraform-registry-address v0.1.0 h1:W6JkV9wbum+m516rCl5/NjKxCyTVaaUBbzYcMzBDO3U=
 github.com/hashicorp/terraform-registry-address v0.1.0/go.mod h1:EnyO2jYO6j29DTHbJcm00E5nQTFeTtyZH3H5ycydQ5A=
 github.com/hashicorp/terraform-svchost v0.0.0-20200729002733-f050f53b9734 h1:HKLsbzeOsfXmKNpr3GiT18XAblV0BjCbzL8KQAMZGa0=