Fix Integration test failures for Big endian on GA CI (#6702)

## What's the problem this PR addresses?

Fixes the GA CI Integration jobs failing for Big endian.

## How did you fix it?

1. Changed the Ubuntu image to Ubuntu 22.04 for Big Endian jobs as it
fixes the test case failures.
Also Ubuntu 20.04 is EOL in April 2025
2. Increased TEST_TIMEOUT for Big Endian to fix the following TC failing
due to timeout issue:
`pkg-tests-specs/sources/commands/constraints/fix.test.js`


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.github/workflows/integration-workflow.yml

@@ -273,7 +273,7 @@ jobs:
         shard: ['1/4', '2/4', '3/4', '4/4']
 
     name: 'Big-endian debian w/ Node.js latest (${{matrix.shard}})'
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     if: |
       github.ref == 'refs/heads/master'
     needs: build

packages/acceptance-tests/pkg-tests-core/sources/utils/tests.ts

@@ -27,7 +27,7 @@ const staticServer = serveStatic(npath.fromPortablePath(require(`pkg-tests-fixtu
 
 // Testing things inside a big-endian container takes forever
 export const TEST_TIMEOUT = os.endianness() === `BE`
-  ? 150000
+  ? 200000
   : 75000;
 
 export type PackageEntry = Map<string, {path: string, packageJson: Record<string, any>}>;