chore: updates for undici fetch (#1496)

## Description

Updates the journey tests and mocking for the undici fetch in KFC

## Related Issue

Fixes #1493 
<!-- or -->
Relates to #

## Type of change

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [x] Other (security config, docs update, etc)

## Checklist before merging
- [x] Unit,
[Journey](https://github.com/defenseunicorns/pepr/tree/main/journey),
[E2E Tests](https://github.com/defenseunicorns/pepr-excellent-examples),
[docs](https://github.com/defenseunicorns/pepr/tree/main/docs),
[adr](https://github.com/defenseunicorns/pepr/tree/main/adr) added or
updated as needed
- [x] [Contributor Guide
Steps](https://docs.pepr.dev/main/contribute/#submitting-a-pull-request)
followed

---------

Signed-off-by: dependabot[bot] <[email protected]>
Signed-off-by: Case Wylie <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

journey/pepr-deploy.ts

@@ -302,7 +302,7 @@ function testStore() {
     // Should have a key from the joke url and getItem should have worked
     const key3 = await waitForPeprStoreKey(
       "pepr-static-test-store",
-      `hello-pepr-v2-https://icanhazdadjoke.com/`,
+      `hello-pepr-v2-https://icanhazdadjoke.com`,
     );
     expect(key3).toBeTruthy();
 

journey/pepr-dev.ts

@@ -3,17 +3,23 @@
 
 import { afterAll, expect, it } from "@jest/globals";
 import { ChildProcessWithoutNullStreams, spawn } from "child_process";
-import { Agent } from "https";
 import { fetch } from "kubernetes-fluent-client";
-import { RequestInit } from "node-fetch";
+import { RequestInit, Agent } from "undici";
 import { cwd } from "./entrypoint.test";
 import { sleep } from "./k8s";
 
 const fetchBaseUrl = "https://localhost:3000";
 const fetchOpts: RequestInit = {
-  agent: new Agent({
-    // Avoid tls issues for self-signed certs
-    rejectUnauthorized: false,
+  method: "GET",
+  headers: {
+    "Content-Type": "application/json; charset=UTF-8",
+  },
+  dispatcher: new Agent({
+    // disable keep-alive https://github.com/nodejs/undici/issues/2522#issuecomment-1859213319
+    pipelining: 0,
+    connect: {
+      rejectUnauthorized: false,
+    },
   }),
 };
 
@@ -78,7 +84,6 @@ export function peprDev() {
       } else {
         // Abort all further processing
         success = true;
-
         // Finish the test
         done();
       }