Change table name in bigquery data config tests

[emilymye]

Release Note Template for Downstream PRs (will be copied)

Fixes hashicorp/terraform-provider-google#6589

Also renamed the example file

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 2 files changed, 4 insertions(+), 4 deletions(-))
Terraform Beta: Diff ( 2 files changed, 4 insertions(+), 4 deletions(-))

[modular-magician]

I have triggered VCR tests based on this PR's diffs. See the results here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=120561"