* Move configuration from lib/service to lib/service/servicecfg
The new servicecfg package will hold only configuration for services.
This will allow other packages (like tctl and tsh) to depend on
servicecfg without pulling in all of lib/service (which has a number
of platform-specific details).
This is the first step towards being able to build tctl for Windows.
* Move PAM and BPF config into servicecfg
This breaks a compile-time dependency on BPF/PAM for tctl.
* Require a new flag for enabling dynamic resources matching for "tsh db configure create"
* rename flag to --dynamic-resources-labels
* make naming more consistent
* Add a new db engine
* Add tests for new engine
* Update tsh db subcommands
* Refactor error message and suggestions for unsupported tsh commands
* Add dynamodb to test plan
* Add AWS external ID to db config and update protos
* Add Azure auto-discovery configuration fields
* Init databases if azure matchers are in config
* Use AzureMatchers in db service
* Use all azure subscriptions/resource groups if omitted in matcher
* Add azure config tests
* Add config create flags for azure matchers
* Add config create tests for azure
* Move discovery flags for azure below aws
* Fixup merge
Generate sample YAML file with a proper duration for dynamic label
period.
The new `teleport db configure` cli command generated dynamic labels
with the period field as an integer rather than `time.Duration`. Our
current yaml.v2 import treats integers as nanoseconds, but has corrected
this behavior in v3 which breaks this implementation.
Zac Bergquist