Removed requirement to have a newline at the beginning of example_config_body files

[melinath]

This requirement is undocumented & unexpected; it causes failures like:

        Error: Invalid single-argument block definition
        
          on terraform_plugin_test.tf line 17, in resource "google_biglake_iceberg_namespace_iam_binding" "foo":
          17: resource "google_biglake_iceberg_namespace_iam_binding" "foo" {catalog = google_biglake_iceberg_catalog.catalog.name
          18: name = "example_namespace"

Ran into this while reviewing #16175

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[melinath]

@modular-magician reassign-reviewer

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[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

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[c2thorn]

likely a formatting issue we ran into during the go rewrite, thanks for untangling