Fix next-swc native binary write in tests (#64744)

## What?

In the past folks on the team have reported that anytime the SWC /
Turbopack binary changes they had to suddenly run `pnpm build-native` in
`packages/next-swc`, even though they didn't build from source before.
While investigating optimizing packing for tests I found that it's
copying the native binary into the original repository not the temporary
repository, which then keeps the file there, even after the tests
finish. This fixes the path to use the tmp repository instead.


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Closes NEXT-3157

test/lib/create-next-install.js

@@ -66,6 +66,28 @@ async function createNextInstall({
         )
         require('console').log('Creating temp repo dir', tmpRepoDir)
 
+        for (const item of ['package.json', 'packages']) {
+          await rootSpan
+            .traceChild(`copy ${item} to temp dir`)
+            .traceAsyncFn(() =>
+              fs.copy(
+                path.join(origRepoDir, item),
+                path.join(tmpRepoDir, item),
+                {
+                  filter: (item) => {
+                    return (
+                      !item.includes('node_modules') &&
+                      !item.includes('pnpm-lock.yaml') &&
+                      !item.includes('.DS_Store') &&
+                      // Exclude Rust compilation files
+                      !/next-swc[\\/]target/.test(item)
+                    )
+                  },
+                }
+              )
+            )
+        }
+
         await rootSpan
           .traceChild('ensure swc binary')
           .traceAsyncFn(async () => {
@@ -81,7 +103,7 @@ async function createNextInstall({
                   folder
                 )
                 const outputPath = path.join(
-                  origRepoDir,
+                  tmpRepoDir,
                   'packages/next-swc/native'
                 )
                 await fs.copy(swcPkgPath, outputPath, {
@@ -99,33 +121,9 @@ async function createNextInstall({
             }
           })
 
-        for (const item of ['package.json', 'packages']) {
-          await rootSpan
-            .traceChild(`copy ${item} to temp dir`)
-            .traceAsyncFn(() =>
-              fs.copy(
-                path.join(origRepoDir, item),
-                path.join(tmpRepoDir, item),
-                {
-                  filter: (item) => {
-                    return (
-                      !item.includes('node_modules') &&
-                      !item.includes('pnpm-lock.yaml') &&
-                      !item.includes('.DS_Store') &&
-                      // Exclude Rust compilation files
-                      !/next[\\/]build[\\/]swc[\\/]target/.test(item) &&
-                      !/next-swc[\\/]target/.test(item)
-                    )
-                  },
-                }
-              )
-            )
-        }
-
         pkgPaths = await rootSpan.traceChild('linkPackages').traceAsyncFn(() =>
           linkPackages({
             repoDir: tmpRepoDir,
-            nextSwcVersion: null,
           })
         )
       }