[dev-tool] remove axios (Azure#27922)

### Packages impacted by this PR

`dev-tool`

### Describe the problem that is addressed by this PR

Rather than pull in `axios` to make a few simple HTTP calls (downloading
the test proxy and checking its status), I replaced it with `fetch`
since that is now unflagged in Node.

To test this change, I removed the locally cached test proxy before
running the keyvault-keys tests.

Author: xirzec

common/config/rush/pnpm-lock.yaml

@@ -48,7 +48,6 @@
     "@rollup/plugin-multi-entry": "^6.0.1",
     "@rollup/plugin-node-resolve": "^15.2.3",
     "@rollup/plugin-inject": "^5.0.5",
-    "axios": "^1.6.2",
     "concurrently": "^8.2.2",
     "chalk": "~4.1.1",
     "decompress": "^4.2.1",

common/tools/dev-tool/package.json

@@ -6,7 +6,6 @@ import { createPrinter } from "./printer";
 import { ProjectInfo, resolveProject, resolveRoot } from "./resolveProject";
 import fs from "fs-extra";
 import path from "path";
-import axios from "axios";
 import decompress from "decompress";
 import envPaths from "env-paths";
 import { promisify } from "util";
@@ -101,7 +100,8 @@ function getDownloadUrl(binary: TestProxyBinary, version: string): string {
 
 async function downloadTestProxy(downloadLocation: string, downloadUrl: string): Promise<void> {
   log(`Downloading test proxy binary from ${downloadUrl}`);
-  const { data } = await axios.get<ArrayBuffer>(downloadUrl, { responseType: "arraybuffer" });
+  const response = await fetch(downloadUrl);
+  const data = await response.arrayBuffer();
   log(`Extracting test proxy binary to ${downloadLocation}`);
   await decompress(Buffer.from(data), downloadLocation);
 }
@@ -278,7 +278,13 @@ export async function startTestProxy(): Promise<TestProxy> {
 
 export async function isProxyToolActive(): Promise<boolean> {
   try {
-    await axios.get(`http://localhost:${process.env.TEST_PROXY_HTTP_PORT ?? 5000}/info/available`);
+    const response = await fetch(
+      `http://localhost:${process.env.TEST_PROXY_HTTP_PORT ?? 5000}/info/available`
+    );
+
+    if (!response.ok) {
+      return false;
+    }
 
     log.info(
       `Proxy tool seems to be active at http://localhost:${