Add nightly Maestro E2E workflow

.github/scripts/fixtures/failed-flow/android/report.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<testsuite name="Maestro Android" tests="2" failures="1" errors="0">
+  <testcase name="login.yml" classname="Maestro" time="11.8" />
+  <testcase name="create-account.yml" classname="Maestro" time="8.1">
+    <failure message="Element not found: Create account">The expected button was not visible.</failure>
+  </testcase>
+</testsuite>

.github/scripts/fixtures/infrastructure-failure/ios/phase.txt

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+Building and installing the development client

.github/scripts/fixtures/success/android/report.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<testsuite name="Maestro Android" tests="1" failures="0" errors="0">
+  <testcase name="login.yml" classname="Maestro" time="11.8" />
+</testsuite>

.github/scripts/fixtures/success/ios/report.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<testsuite name="Maestro iOS" tests="1" failures="0" errors="0">
+  <testcase name="login.yml" classname="Maestro" time="12.4" />
+</testsuite>