Support X-Goog-Request-Reason system parameter

[salrashid123]

X-Goog-Request-Reason header is a google api system property which alows a user to define an arbitrary "reason" for the api request. This reason is a user-defined text field that shows up in audit logs

for more information, see

• https://github.com/salrashid123/request_reason

the usecase for this is to embed a jira ticket number or commit hash or any other type of arbitrary 'reason'

at the moment, the google provider supports this header value as an environment variable

$ export CLOUDSDK_CORE_REQUEST_REASON="fooo"
$ terraform apply

This FR seeks to add the request reason in as a provider configuration:

provider "google-local" {
  project = "your_projectid"
  request_reason = "somereason"
}

data "google_secret_manager_secret_version" "basic" {
  secret = "thepassword"
}

output "data" {
  value = data.google_secret_manager_secret_version.basic.name
}

[github-actions]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.