ci: add tests for Unity 6 and build profiles

.github/workflows/build-tests-ubuntu.yml

@@ -91,6 +91,12 @@ jobs:
           - targetPlatform: StandaloneWindows64
             additionalParameters: -standaloneBuildSubtarget Server
             buildWithIl2cpp: true
+        include:
+          - unityVersion: 6000.0.36f1
+            targetPlatform: WebGL
+          - unityVersion: 6000.0.36f1
+            targetPlatform: WebGL
+            buildProfile: 'Assets/Settings/Build Profiles/Sample WebGL Build Profile.asset'
 
     steps:
       - name: Clear Space for Android Build

test-project/Assets/Settings/Build Profiles/Sample WebGL Build Profile.asset

@@ -0,0 +1,46 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!114 &11400000
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 0}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 15003, guid: 0000000000000000e000000000000000, type: 0}
+  m_Name: Sample WebGL Build Profile
+  m_EditorClassIdentifier: 
+  m_AssetVersion: 1
+  m_BuildTarget: 20
+  m_Subtarget: 0
+  m_PlatformId: 84a3bb9e7420477f885e98145999eb20
+  m_PlatformBuildProfile:
+    rid: 200022742090383361
+  m_OverrideGlobalSceneList: 0
+  m_Scenes: []
+  m_ScriptingDefines: []
+  m_PlayerSettingsYaml:
+    m_Settings: []
+  references:
+    version: 2
+    RefIds:
+    - rid: 200022742090383361
+      type: {class: WebGLPlatformSettings, ns: UnityEditor.WebGL, asm: UnityEditor.WebGL.Extensions}
+      data:
+        m_Development: 0
+        m_ConnectProfiler: 0
+        m_BuildWithDeepProfilingSupport: 0
+        m_AllowDebugging: 0
+        m_WaitForManagedDebugger: 0
+        m_ManagedDebuggerFixedPort: 0
+        m_ExplicitNullChecks: 0
+        m_ExplicitDivideByZeroChecks: 0
+        m_ExplicitArrayBoundsChecks: 0
+        m_CompressionType: -1
+        m_InstallInBuildFolder: 0
+        m_CodeOptimization: 0
+        m_WebGLClientBrowserPath: 
+        m_WebGLClientBrowserType: 0
+        m_WebGLTextureSubtarget: 0