Merge pull request #54434 from maxwelldb/deprecation-snippet-osdocs-4775

[OSDOCS-4775] Create deprecated feature snippet

Author: maxwelldb

snippets/deprecated-feature.adoc

@@ -0,0 +1,12 @@
+// When including this file, ensure that {FeatureName} is set immediately before
+// the include. Otherwise it will result in an incorrect replacement.
+
+[IMPORTANT]
+====
+[subs="attributes+"]
+{FeatureName} is a deprecated feature. Deprecated functionality is still included in {product-title} and continues to be supported; however, it will be removed in a future release of this product and is not recommended for new deployments.
+
+For the most recent list of major functionality that has been deprecated or removed within {product-title}, refer to the _Deprecated and removed features_ section of the {product-title} release notes.
+====
+// Undefine {FeatureName} attribute, so that any mistakes are easily spotted
+:!FeatureName: