move implementation to internal/ directory (#828)

internal/platformtest/platformtest_logging.go

@@ -0,0 +1,14 @@
+package platformtest
+
+import (
+	"context"
+
+	"github.com/zrepl/zrepl/internal/daemon/logging"
+	"github.com/zrepl/zrepl/internal/logger"
+)
+
+type Logger = logger.Logger
+
+func GetLog(ctx context.Context) Logger {
+	return logging.GetLogger(ctx, logging.SubsysPlatformtest)
+}