Add generic read/update/delete commands (#3992)

* Add generic read/update/delete commands

This adds three generic commands that use the resource prefix to
determine the subcommand to run and pass through args over to that
subcommand. Since this occurs very early on and to avoid loading
essentially every internal resource package, I moved subtype definitions
to globals.

This replaces #3967

Co-authored-by: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>

* De-duplicate Subtype code (#4031)

Co-authored-by: Timothy Messier <tim.messier@gmail.com>

---------

Co-authored-by: Johan Brandhorst-Satzkorn <johan.brandhorst@gmail.com>
Co-authored-by: Timothy Messier <tim.messier@gmail.com>

internal/cmd/base/base.go

@@ -142,12 +142,14 @@ type Command struct {
 }
 
 // New returns a new instance of a base.Command type
-func NewCommand(ui cli.Ui) *Command {
+func NewCommand(ui cli.Ui, opt ...Option) *Command {
+	opts := getOpts(opt...)
 	ctx, cancel := context.WithCancel(context.Background())
 	ret := &Command{
 		UI:         ui,
 		ShutdownCh: MakeShutdownCh(),
 		Context:    ctx,
+		FlagId:     opts.withImplicitId,
 	}
 	go func() {
 		<-ret.ShutdownCh

internal/cmd/base/option.go

@@ -44,6 +44,7 @@ type Options struct {
 	withStatusCode                 int
 	withHostPlugin                 func() (string, plugin.HostPluginServiceClient)
 	withEventGating                bool
+	withImplicitId                 string
 }
 
 func getDefaultOptions() Options {
@@ -200,3 +201,11 @@ func WithEventGating(with bool) Option {
 		o.withEventGating = with
 	}
 }
+
+// WithImplicitId is used when creating the command if we are implicitly
+// overriding the ID via a top-level read/update/delete command
+func WithImplicitId(with string) Option {
+	return func(o *Options) {
+		o.withImplicitId = with
+	}
+}