GA google_container_cluster maintenance policy recurring window

[slevenick]

Requested in hashicorp/terraform-provider-google#5391

release_channel is not yet GA, so this only fixes half of that request

Release Note Template for Downstream PRs (will be copied)

container: Added field `maintenance_policy.recurring_window` to  `google_container_cluster` (GA only)

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 3 files changed, 108 insertions(+), 5 deletions(-))
Terraform Beta: Diff ( 2 files changed, 2 insertions(+), 6 deletions(-))

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 4 files changed, 129 insertions(+), 5 deletions(-))
Terraform Beta: Diff ( 3 files changed, 10 insertions(+), 14 deletions(-))
TF Conversion: Diff ( 1 file changed, 8 insertions(+))

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 4 files changed, 153 insertions(+), 5 deletions(-))
Terraform Beta: Diff ( 3 files changed, 10 insertions(+), 14 deletions(-))
TF Conversion: Diff ( 1 file changed, 8 insertions(+))