Expose transitEncryptionMode attribute for google_redis_instance

[trickyearlobe]

As requested in inspec/inspec-gcp#305
Adding an Enum for transitEncryptionMode on google_redis_instance.

Impact on Terraform has not been tested... is it more appropriate
to do this in the inspec.yaml to avoid unexpected problems with
existing terraform plans?

Signed-off-by: Richard Nixon rnixon@chef.io

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)

As requested in https://github.com/inspec/inspec-gcp/issues/305
Adding an Enum for transitEncryptionMode on google_redis_instance.

[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.

@rileykarson, 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, 38 insertions(+))
Terraform Beta: Diff ( 2 files changed, 38 insertions(+))
Ansible: Diff ( 2 files changed, 24 insertions(+))
TF Conversion: Diff ( 1 file changed, 10 insertions(+))
Inspec: Diff ( 4 files changed, 11 insertions(+))

[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.

[rileykarson]

This duplicates #4444, let's use that one instead. There's some nuance to the conditions under which the field can be updated that is a WIP for that PR.

[trickyearlobe]

Cheers