CI(allure-report-generate): Install allure to /tmp (#11579)

## Problem

The `/__w/neon/neon` directory is mounted from host to container and
persists between runs.
Sometimes the next workflow run fails to delete it:

```
Deleting the contents of '/__w/neon/neon'
Error: File was unable to be removed Error: EACCES: permission denied, rmdir '/__w/neon/neon/allure-2.32.2/bin'
```

## Summary of changes
- Download and install allure to `/tmp` which exists in container only

Ref https://github.com/neondatabase/cloud/issues/27186

.github/actions/allure-report-generate/action.yml

@@ -70,6 +70,7 @@ runs:
 
     - name: Install Allure
       shell: bash -euxo pipefail {0}
+      working-directory: /tmp
       run: |
         if ! which allure; then
           ALLURE_ZIP=allure-${ALLURE_VERSION}.zip