Update workflow to latest standards + add test projects (#102)

* Move test-project to subfolder

* Update workflow to target test-project

* Add 2018.3-legacy test-project

* Rename to legacy-render-pipeline

* Add test project for URP

* Cache LFS

* Update license

* Ignore artifacts

* Add test project for HDRP

* Avoid ambiguity in cache key

test-projects/test-project/ProjectSettings/UnityConnectSettings.asset

@@ -0,0 +1,34 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!310 &1
+UnityConnectSettings:
+  m_ObjectHideFlags: 0
+  serializedVersion: 1
+  m_Enabled: 0
+  m_TestMode: 0
+  m_EventOldUrl: https://api.uca.cloud.unity3d.com/v1/events
+  m_EventUrl: https://cdp.cloud.unity3d.com/v1/events
+  m_ConfigUrl: https://config.uca.cloud.unity3d.com
+  m_TestInitMode: 0
+  CrashReportingSettings:
+    m_EventUrl: https://perf-events.cloud.unity3d.com
+    m_Enabled: 0
+    m_LogBufferSize: 10
+    m_CaptureEditorExceptions: 1
+  UnityPurchasingSettings:
+    m_Enabled: 0
+    m_TestMode: 0
+  UnityAnalyticsSettings:
+    m_Enabled: 0
+    m_TestMode: 0
+    m_InitializeOnStartup: 1
+  UnityAdsSettings:
+    m_Enabled: 0
+    m_InitializeOnStartup: 1
+    m_TestMode: 0
+    m_IosGameId:
+    m_AndroidGameId:
+    m_GameIds: {}
+    m_GameId:
+  PerformanceReportingSettings:
+    m_Enabled: 0