New data source for oidc tokens

[danawillow]

Upstreams hashicorp/terraform-provider-google#5670
Fixes hashicorp/terraform-provider-google#5669

Release Note Template for Downstream PRs (will be copied)

`google_service_account_id_token`

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[modular-magician]

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

Diff report:

Terraform GA: Diff ( 7 files changed, 373 insertions(+), 7 deletions(-))
Terraform Beta: Diff ( 7 files changed, 373 insertions(+), 7 deletions(-))
TF Conversion: Diff ( 1 file changed, 30 insertions(+), 7 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=132427"

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 7 files changed, 373 insertions(+), 7 deletions(-))
Terraform Beta: Diff ( 7 files changed, 373 insertions(+), 7 deletions(-))
TF Conversion: Diff ( 1 file changed, 30 insertions(+), 7 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=133091"

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 7 files changed, 373 insertions(+), 7 deletions(-))
Terraform Beta: Diff ( 7 files changed, 373 insertions(+), 7 deletions(-))
TF Conversion: Diff ( 1 file changed, 30 insertions(+), 7 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=133091"