[iOS] matrix path not found in json

[andreschab90]

Describe the bug
I see the following warning for all shards in the flank ouput matrix path not found in json ...

To Reproduce
Steps to reproduce the behaviour:

1. Run ios test suite via flank
2. See warning in the output

Expected behaviour
none warning should be shown

Details (please complete the following information):

• Have you tested on the latest Flank snapshot? no
• flank version: v20.06.0
• revision: 77f18db

[adamfilipow92]

Can you attach your flank.yml? I want to be sure we going to the right side.
Thanks! @andreschab90

[andreschab90]

gcloud:
  results-bucket: testlab
  record-video: true
  timeout: 30m
  async: false
  results-history-name: PROD
  num-flaky-test-attempts: 1
  test: $BITRISE_TEST_BUNDLE_ZIP_PATH
  xctestrun-file: $BITRISE_XCTESTRUN_FILE_PATH
  device:
  - model: iphonexr
    version: 13.2
    locale: en
    orientation: portrait
flank:
  max-test-shards: 15
  shard-time: -1
  num-test-runs: 1
  smart-flank-gcs-path: gs://testlab/firebase-test-calculation/results.xml
  smart-flank-disable-upload: true
  disable-sharding: false
  project: testing