Allow --splitting and --compile together (#23017)

### What does this PR do?

### How did you verify your code works?

test/bundler/bundler_compile_splitting.test.ts

@@ -0,0 +1,40 @@
+import { describe } from "bun:test";
+import { itBundled } from "./expectBundled";
+
+describe("bundler", () => {
+  describe("compile with splitting", () => {
+    itBundled("compile/splitting/RelativePathsAcrossChunks", {
+      compile: true,
+      splitting: true,
+      backend: "cli",
+      files: {
+        "/src/app/entry.ts": /* js */ `
+          console.log('app entry');
+          import('../components/header').then(m => m.render());
+        `,
+        "/src/components/header.ts": /* js */ `
+          export async function render() {
+            console.log('header rendering');
+            const nav = await import('./nav/menu');
+            nav.show();
+          }
+        `,
+        "/src/components/nav/menu.ts": /* js */ `
+          export async function show() {
+            console.log('menu showing');
+            const items = await import('./items');
+            console.log('items:', items.list);
+          }
+        `,
+        "/src/components/nav/items.ts": /* js */ `
+          export const list = ['home', 'about', 'contact'].join(',');
+        `,
+      },
+      entryPoints: ["/src/app/entry.ts"],
+      outdir: "/build",
+      run: {
+        stdout: "app entry\nheader rendering\nmenu showing\nitems: home,about,contact",
+      },
+    });
+  });
+});

test/bundler/expectBundled.ts

@@ -524,7 +524,15 @@ function expectBundled(
   if (metafile === true) metafile = "/metafile.json";
   if (bundleErrors === true) bundleErrors = {};
   if (bundleWarnings === true) bundleWarnings = {};
-  const useOutFile = generateOutput == false ? false : outfile ? true : outdir ? false : entryPoints.length === 1;
+  const useOutFile = compile
+    ? true
+    : generateOutput == false
+      ? false
+      : outfile
+        ? true
+        : outdir
+          ? false
+          : entryPoints.length === 1;
 
   if (bundling === false && entryPoints.length > 1) {
     throw new Error("bundling:false only supports a single entry point");
@@ -1087,14 +1095,16 @@ function expectBundled(
           define: define ?? {},
           throw: _throw ?? false,
           compile,
-          jsx: jsx ? {
-            runtime: jsx.runtime,
-            importSource: jsx.importSource,
-            factory: jsx.factory,
-            fragment: jsx.fragment,
-            sideEffects: jsx.sideEffects,
-            development: jsx.development,
-          } : undefined,
+          jsx: jsx
+            ? {
+                runtime: jsx.runtime,
+                importSource: jsx.importSource,
+                factory: jsx.factory,
+                fragment: jsx.fragment,
+                sideEffects: jsx.sideEffects,
+                development: jsx.development,
+              }
+            : undefined,
         } as BuildConfig;
 
         if (dotenv) {