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

node_modules/@opentelemetry/otlp-exporter-base/build/esm/OTLPExporterBase.d.ts

@@ -0,0 +1,15 @@
+import { ExportResult } from '@opentelemetry/core';
+import { IOtlpExportDelegate } from './otlp-export-delegate';
+export declare class OTLPExporterBase<Internal> {
+    private _delegate;
+    constructor(_delegate: IOtlpExportDelegate<Internal>);
+    /**
+     * Export items.
+     * @param items
+     * @param resultCallback
+     */
+    export(items: Internal, resultCallback: (result: ExportResult) => void): void;
+    forceFlush(): Promise<void>;
+    shutdown(): Promise<void>;
+}
+//# sourceMappingURL=OTLPExporterBase.d.ts.map