add initial_size to google_compute_node_group

[ScottSuarez]

closes hashicorp/terraform-provider-google#4275

If this PR is for Terraform, I acknowledge that I have:

• Searched through the issue tracker for an open issue that this either resolves or contributes to, commented on it to claim it, and written "fixes {url}" or "part of {url}" in this PR description. If there were no relevant open issues, I opened one and commented that I would like to work on it (not necessary for very small changes).
• Generated Terraform, and ran make test and make lint to ensure it passes unit and linter tests.
• Ensured that all new fields I added that can be set by a user appear in at least one example (for generated resources) or third_party test (for handwritten resources or update tests).
• Ran relevant acceptance tests (If the acceptance tests do not yet pass or you are unable to run them, please let your reviewer know).
• Read the Release Notes Guide before writing my release note below.

Release Note Template for Downstream PRs (will be copied)

compute: added `initial_size` to account for scenarios where size may change under the hood in resource `google_compute_node_group`

[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, 37 insertions(+), 15 deletions(-))
Terraform Beta: Diff ( 3 files changed, 37 insertions(+), 15 deletions(-))
Ansible: Diff ( 2 files changed, 30 insertions(+), 7 deletions(-))
TF OiCS: Diff ( 1 file changed, 1 insertion(+), 1 deletion(-))
Inspec: Diff ( 4 files changed, 8 insertions(+), 1 deletion(-))

[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=184946"

[rileykarson]

I think we'll need to make most of these changes in terraform.yaml (any api.yaml property can be used there, it overwrites the api.yaml value) to avoid breaking Ansible / possibly InSpec

[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, 37 insertions(+), 15 deletions(-))
Terraform Beta: Diff ( 3 files changed, 37 insertions(+), 15 deletions(-))
Ansible: Diff ( 2 files changed, 29 insertions(+), 6 deletions(-))
TF OiCS: Diff ( 1 file changed, 1 insertion(+), 1 deletion(-))
Inspec: Diff ( 4 files changed, 8 insertions(+), 1 deletion(-))

[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=185512"

[rileykarson]

Couple small extra notes on the .yaml files- seems like InSpec is still generating so let's make sure that is OK.

@slevenick: It seems inspec isn't respecting the include- is that a problem?

[slevenick]

Couple small extra notes on the .yaml files- seems like InSpec is still generating so let's make sure that is OK.

@slevenick: It seems inspec isn't respecting the include- is that a problem?

Not a big deal

[ScottSuarez]

/gcbrun

[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, 37 insertions(+), 15 deletions(-))
Terraform Beta: Diff ( 4 files changed, 38 insertions(+), 16 deletions(-))
Ansible: Diff ( 1 file changed, 3 insertions(+), 3 deletions(-))
TF OiCS: Diff ( 1 file changed, 1 insertion(+), 1 deletion(-))

[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=185686"

[modular-magician]

I have triggered VCR tests in RECORDING mode for the following tests that failed during VCR: TestAccComputeBackendService_internalLoadBalancing|TestAccComputeNodeGroup_nodeGroupAutoscalingPolicyExample You can view the result here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=185688"

[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, 37 insertions(+), 15 deletions(-))
Terraform Beta: Diff ( 3 files changed, 37 insertions(+), 15 deletions(-))
Ansible: Diff ( 1 file changed, 1 insertion(+), 1 deletion(-))
TF OiCS: Diff ( 1 file changed, 1 insertion(+), 1 deletion(-))

[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=185787"