feat: Adapt new iOS xml structure

[piotradamczyk5]

Fixes #2144

Test Plan

How do we know the code works?

iOS XML report is changed:

• Test suite is now empty
• Previous testsuite name is added as a prefix to the classname

1. Run iOS tests without option async: true
2. Check generated XML report

Before:

<?xml version='1.0' encoding='UTF-8' ?>
<testsuites>
  <testsuite name="iphone8-11.4-en_US-portrait#EarlGreyExampleSwiftTests" tests="1" failures="0" errors="0" skipped="0" time="1.969" hostname="localhost">
    <testcase name="testLayout()" classname="EarlGreyExampleSwiftTests" time="1.968">
      <webLink>https://console.firebase.google.com/project/flank-open-source/testlab/histories/bh.a3b607c9bb6d0088/matrices/7816289963561003834/executions/bs.4bace0b897feb88b</webLink>
    </testcase>
  </testsuite>
</testsuites>

After

<?xml version='1.0' encoding='UTF-8' ?>
<testsuites>
  <testsuite name="" tests="1" failures="0" errors="0" skipped="0" time="1.958" hostname="localhost">
    <testcase name="testLayout()" classname="iphone8-11.4-en_US-portrait#EarlGreyExampleSwiftTests.EarlGreyExampleSwiftTests" time="1.957">
      <webLink>https://console.firebase.google.com/project/flank-open-source/testlab/histories/bh.a3b607c9bb6d0088/matrices/8549684621728392308/executions/bs.1e34a280d8b442cd</webLink>
    </testcase>
  </testsuite>
</testsuites>

[github-actions]

Timestamp: 2021-08-30 18:31:58
Buildscan url for ubuntu-workflow run 1183273064
https://gradle.com/s/bex2qoztnl3fq

[pawelpasterz]

@flank-it

[github-actions]

Integration tests succeed for all OSs ✅
Windows Build scan: https://gradle.com/s/kwvdna7s77js4
MacOS Build scan:
Linux Build scan: https://gradle.com/s/mqnmdhduzdfdu
Workflow run https://github.com/Flank/flank/actions/runs/1183589257

[Sloox]

🚀