Fix tests using multiple controllers (#1734)

The previous PR only initialized plugins if they were required, which
meant that there may not actually be a plugin manager running because a
second node would not actually create the dev database, which is where
the plugin was being added. The assumption that a plugin manager is
running is still a fine one at the moment, but we just need to make sure
it's running in _all_ cases.

internal/cmd/base/dev.go

@@ -16,7 +16,6 @@ import (
 	"github.com/hashicorp/boundary/internal/iam"
 	"github.com/hashicorp/boundary/internal/kms"
 	"github.com/hashicorp/boundary/internal/observability/event"
-	hostplugin "github.com/hashicorp/boundary/internal/plugin/host"
 	"github.com/hashicorp/boundary/internal/types/scope"
 	"github.com/hashicorp/boundary/testing/dbtest"
 	capoidc "github.com/hashicorp/cap/oidc"
@@ -143,18 +142,6 @@ func (b *Server) CreateDevDatabase(ctx context.Context, opt ...Option) error {
 		return err
 	}
 
-	if opts.withHostPlugin != nil {
-		pluginId, plg := opts.withHostPlugin()
-		b.DevLoopbackHostPluginId = pluginId
-		opts := []hostplugin.Option{
-			hostplugin.WithDescription("Provides an initial loopback host plugin in Boundary"),
-			hostplugin.WithPublicId(b.DevLoopbackHostPluginId),
-		}
-		if _, err = b.RegisterHostPlugin(ctx, "loopback", plg, opts...); err != nil {
-			return err
-		}
-	}
-
 	if opts.withSkipHostResourcesCreation {
 		// now that we have passed all the error cases, reset c to be a noop so the
 		// defer doesn't do anything.