Add IContextCache to deploy connectors (#13287)

* Add IContextCache and implementations

* Update connector interfaces to use IContextCache

* Minor cleanup

* Move DeployContextCache prefix to constant

* Move default implementations to obsolete methods

* Remove DeployContextCache and DictionaryCache

Co-authored-by: Andy Butland <abutland73@gmail.com>

src/Umbraco.Core/Deploy/PassThroughCache.cs

@@ -0,0 +1,34 @@
+namespace Umbraco.Cms.Core.Deploy;
+
+/// <summary>
+/// A pass through context cache that always creates the items.
+/// </summary>
+/// <seealso cref="Umbraco.Cms.Core.Deploy.IContextCache" />
+public sealed class PassThroughCache : IContextCache
+{
+    /// <summary>
+    /// Gets the instance.
+    /// </summary>
+    /// <value>
+    /// The instance.
+    /// </value>
+    public static PassThroughCache Instance { get; } = new PassThroughCache();
+
+    /// <summary>
+    /// Prevents a default instance of the <see cref="PassThroughCache"/> class from being created.
+    /// </summary>
+    private PassThroughCache()
+    { }
+
+    /// <inheritdoc />
+    public void Create<T>(string key, T item)
+    { }
+
+    /// <inheritdoc />
+    public T? GetOrCreate<T>(string key, Func<T?> factory)
+        => factory();
+
+    /// <inheritdoc />
+    public void Clear()
+    { }
+}