ci: disable it-tests for windows-latest,yarn (#1196)

## Proposed change

In the current state, the run of it-tests on `[windows-latest, yarn]` is
slow and fails most of the time (related to concurrent access to the
disk)
This specific combination does not bring a lot of value since we already
cover `[linux, yarn]` and `[windows, npm]`, so I propose to disable it,
at least until we find a way to make it reliable

## Related issues

- 🐛 Fixes #(issue)
- 🚀 Feature #(issue)

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.github/workflows/it-tests.yml

@@ -52,6 +52,9 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest]
         packageManager: [yarn, npm]
+        exclude:
+          - os: windows-latest
+            packageManager: yarn
     runs-on: ${{ matrix.os }}
     env:
       NX_CLOUD_ACCESS_TOKEN: ${{ secrets.NX_CLOUD_ACCESS_TOKEN }}