Update examples for Cloud Bigtable AppProfile

[kevinsi4508]

With latest cluster group support, users can create 3 different flavors of AppProfile:

Any cluster: requests can be routed to any of the clusters in an instance.
Single cluster: requests can be routed to the only cluster specified in the AppProfile.
Muti cluster: request can be routed to a group of clusters specified in the AppProfile.
Update the examples to show users can create all 3 different flavors of AppProfile mentioned above.

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)

bigtable: Update the examples to show users can create all 3 different flavors of AppProfile

[modular-magician]

Oops! It looks like you're using an unknown release-note type in your changelog entries:

• REPLACEME

Please only use the types listed in https://github.com/GoogleCloudPlatform/magic-modules/blob/master/.ci/RELEASE_NOTES_GUIDE.md.

[modular-magician]

Hello! I am a robot who works on Magic Modules PRs.

I have detected that you are a community contributor, so your PR will be assigned to someone with a commit-bit on this repo for initial review.

Thanks for your contribution! A human will be with you soon.

@slevenick, please review this PR or find an appropriate assignee.

[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, 150 insertions(+), 11 deletions(-))
Terraform Beta: Diff ( 2 files changed, 150 insertions(+), 11 deletions(-))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))
TF OiCS: Diff ( 6 files changed, 153 insertions(+), 3 deletions(-))

[slevenick]

Changing this id to cluster-1 will interfere with running multiple tests in parallel. Is there a reason to hard-code this?

[kevinsi4508]

hm.. interesting. Where are the multiple tests coming from?

If the instance ID (or name) is the same, there is already a naming collision and running multiple tests with that naming collision will have problem.

If the there is no naming collision at the instance level, there should not be a problem using the same cluster ID in different instances.

For example, the following is not a problem:

Instance-1
cluster1: 'projects/my-project-id/instances/Instance-1/clusters/cluster-1'
cluster1: 'projects/my-project-id/instances/Instance-1/clusters/cluster-2'

Instance-2
cluster1: 'projects/my-project-id/instances/Instance-2/clusters/cluster-1'
cluster1: 'projects/my-project-id/instances/Instance-2/clusters/cluster-2'

[kevinsi4508]

I was thinking of doing something like this:

"cluster_id = "<%= ctx[:vars]['instance_name'] %>"-c1"
"cluster_id = "<%= ctx[:vars]['instance_name'] %>"-c2"

I thought it is really not needed. As long as the instance ID/name is unique, we can hardcode the cluster IDs (as long as they are unique within the instance).

[slevenick]

/gcbrun

[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, 150 insertions(+), 11 deletions(-))
Terraform Beta: Diff ( 2 files changed, 150 insertions(+), 11 deletions(-))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))
TF OiCS: Diff ( 6 files changed, 153 insertions(+), 3 deletions(-))

[slevenick]

Looks good to me!