Add/update filtered-sum-bms benchmark

spot-launcher/node_modules/@aws-sdk/middleware-sdk-ec2/dist-es/fixture.js

@@ -0,0 +1,13 @@
+export class MockSha256 {
+    constructor(secret) { }
+    update(data) { }
+    digest() {
+        return Promise.resolve(new Uint8Array(5));
+    }
+}
+export const region = () => Promise.resolve("mock-region");
+export const credentials = () => Promise.resolve({
+    accessKeyId: "akid",
+    secretAccessKey: "secret",
+    sessionToken: "session",
+});