Update test framework: fix run_tests.py to support all test files, add auto-import-check for test files

node_modules/@opentelemetry/sdk-metrics/build/esnext/exemplar/Exemplar.d.ts

@@ -0,0 +1,15 @@
+import { HrTime, Attributes } from '@opentelemetry/api';
+/**
+ * A representation of an exemplar, which is a sample input measurement.
+ * Exemplars also hold information about the environment when the measurement
+ * was recorded, for example the span and trace ID of the active span when the
+ * exemplar was recorded.
+ */
+export type Exemplar = {
+    filteredAttributes: Attributes;
+    value: number;
+    timestamp: HrTime;
+    spanId?: string;
+    traceId?: string;
+};
+//# sourceMappingURL=Exemplar.d.ts.map