chore(cli): correctly install dependencies in integ tests after refac…

…tor (#12029)

The changes from #11595 moved some helper TypeScript files around.
When running without compiling first (like in the pipeline, or in the canaries),
we need to install the dependencies those files need manually.
Unfortunately, after the move, they are now installed in a sibling directory,
not in any ancestor directory,
and so `require`ing them fails.

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/aws-cdk/.npmignore

@@ -25,6 +25,7 @@ tsconfig.json
 !lib/init-templates/**/jest.config.js
 
 !test/integ/cli/jest.config.js
+!test/integ/uberpackage/jest.config.js
 !test/integ/cli-regression-patches/**/*
 
 .DS_Store

packages/aws-cdk/test/integ/common/jest-test.bash

@@ -5,7 +5,7 @@ function invokeJest() {
   # package.json.
   if ! npx --no-install jest --version; then
     echo 'Looks like we need to install jest first. Hold on.' >& 2
-    npm install --prefix . jest jest-junit aws-sdk
+    npm install --prefix .. jest jest-junit aws-sdk
   fi
 
   # This must --runInBand because parallelism is arranged for inside the tests