PNPM failing with nested projects

[kamil-bielecki-bosch]

Describe the bug

Since last refactoring/rework of analyzer's PNPM package manager some of projects cannot be scanned anymore.
There is the exception thrown during JSON parsing (output of pnpm run)
We found, that commit 0eb1eea introduced new parameters for pnpm command (--json instead of --parseable and value for --recursive parameter), that leads to generate unparseable output.

To Reproduce

There is test prepared for the issue under #9771
https://github.com/oss-review-toolkit/ort/blob/fbb3a47bb65f25c0b67c4d312cd0adb3e29960c9/plugins/package-managers/node/src/funTest/kotlin/pnpm/PnpmFunTest.kt

Error output for this test:
https://github.com/oss-review-toolkit/ort/actions/runs/12829313519/job/35775116991?pr=9771#step:7:2104

Expected behavior

Projects such as described should be analyzed without exceptions.

Console / log output

PNPM failed to resolve dependencies for path 'frontend/package.json': JsonDecodingException: Unexpected JSON token at offset 1201: Expected EOF after parsing, but had [ instead at path: $
JSON input: .....-scope"
      }
    }
  }
]

[
  {
    "name": "cypress-e2e".....