Move test projects from src/ to tests/ (#11357)

* Update gitignore

* Move csproj

* Update project references

* Update solutions

* Update build scripts

* Tests used to share editorconfig with projects in src

* Fix broken tests.

* Stop copying around .editorconfig

merged root one with linting

* csharp_style_expression_bodied -> suggestion

* Move StyleCop rulesets to matching directories and update shared build properties

* Remove legacy build files, update NuGet.cofig and solution files

* Restore myget source

* Clean up .gitignore

* Update .gitignore

* Move new test classes to tests after merge

* Gitignore + nuget config

* Move new test

Co-authored-by: Ronald Barendse <ronald@barend.se>

tests/Umbraco.Tests.Integration/Testing/TestDbMeta.cs

@@ -0,0 +1,37 @@
+// Copyright (c) Umbraco.
+// See LICENSE for more details.
+
+using System.Text.RegularExpressions;
+
+namespace Umbraco.Cms.Tests.Integration.Testing
+{
+    public class TestDbMeta
+    {
+        public string Name { get; }
+
+        public bool IsEmpty { get; }
+
+        public string ConnectionString { get; set; }
+
+        private TestDbMeta(string name, bool isEmpty, string connectionString)
+        {
+            IsEmpty = isEmpty;
+            Name = name;
+            ConnectionString = connectionString;
+        }
+
+        private static string ConstructConnectionString(string masterConnectionString, string databaseName)
+        {
+            string prefix = Regex.Replace(masterConnectionString, "Database=.+?;", string.Empty);
+            string connectionString = $"{prefix};Database={databaseName};";
+            return connectionString.Replace(";;", ";");
+        }
+
+        public static TestDbMeta CreateWithMasterConnectionString(string name, bool isEmpty, string masterConnectionString) =>
+            new TestDbMeta(name, isEmpty, ConstructConnectionString(masterConnectionString, name));
+
+        // LocalDb mdf funtimes
+        public static TestDbMeta CreateWithoutConnectionString(string name, bool isEmpty) =>
+            new TestDbMeta(name, isEmpty, null);
+    }
+}