Update flaky dev tests (#46179)

ref:
[slack](https://vercel.slack.com/archives/C04DUD7EB1B/p1676914009577859)

## Bug

- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have a helpful link attached, see
[`contributing.md`](https://github.com/vercel/next.js/blob/canary/contributing.md)

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the
feature request has been accepted for implementation before opening a
PR.
- [ ] Related issues linked using `fixes #number`
- [ ]
[e2e](https://github.com/vercel/next.js/blob/canary/contributing/core/testing.md#writing-tests-for-nextjs)
tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have a helpful link attached, see
[`contributing.md`](https://github.com/vercel/next.js/blob/canary/contributing.md)

## Documentation / Examples

- [ ] Make sure the linting passes by running `pnpm build && pnpm lint`
- [ ] The "examples guidelines" are followed from [our contributing
doc](https://github.com/vercel/next.js/blob/canary/contributing/examples/adding-examples.md)

Co-authored-by: JJ Kasper <jj@jjsweb.site>

test/development/acceptance-app/invalid-imports.test.ts

@@ -188,6 +188,7 @@ createNextDescribe(
           [
             'app/comp2.js',
             `
+            import 'server-only-package'
             export function Comp2() {
               return (
                 <div>Hello world</div>
@@ -198,8 +199,7 @@ createNextDescribe(
           ],
           [
             'app/page.js',
-            `'use client'
-          import { Comp1 } from './comp1'
+            `import { Comp1 } from './comp1'
           
           export default function Page() {
             return <Comp1 />
@@ -209,9 +209,9 @@ createNextDescribe(
         ])
       )
 
-      const file = 'app/comp2.js'
+      const file = 'app/page.js'
       const content = await next.readFile(file)
-      await session.patch(file, 'import "server-only-package"\n' + content)
+      await session.patch(file, "'use client'\n" + content)
 
       expect(await session.hasRedbox(true)).toBe(true)
       expect(await session.getRedboxSource()).toMatchInlineSnapshot(`

test/development/acceptance-app/rsc-build-errors.test.ts

@@ -46,23 +46,28 @@ createNextDescribe(
 
       const pageFile = 'app/client-with-errors/metadata-export/page.js'
       const content = await next.readFile(pageFile)
+
+      // Add `metadata` error
       let uncomment = content.replace(
         '// export const metadata',
         'export const metadata'
       )
       await session.patch(pageFile, uncomment)
-
       expect(await session.hasRedbox(true)).toBe(true)
       expect(await session.getRedboxSource()).toInclude(
         '"metadata" is not supported in app/'
       )
 
+      // Restore file
+      await session.patch(pageFile, content)
+      expect(await session.hasRedbox(false)).toBe(false)
+
+      // Add `generateMetadata` error
       uncomment = content.replace(
         '// export async function generateMetadata',
         'export async function generateMetadata'
       )
       await session.patch(pageFile, uncomment)
-
       expect(await session.hasRedbox(true)).toBe(true)
       expect(await session.getRedboxSource()).toInclude(
         '"generateMetadata" is not supported in app/'