ES-9508 Simplefs deprecation

Author: lukewhiting

x-pack/plugin/deprecation/src/main/java/org/elasticsearch/xpack/deprecation/IndexDeprecationChecker.java

@@ -229,7 +229,7 @@ private DeprecationIssue storeTypeSettingCheck(
             return new DeprecationIssue(
                 DeprecationIssue.Level.WARNING,
                 "[simplefs] is deprecated and will be removed in future versions",
-                "https://www.elastic.co/guide/en/elasticsearch/reference/current/index-modules-store.html",
+                "https://ela.st/es-deprecation-7-simplefs",
                 "[simplefs] is deprecated and will be removed in 8.0. Use [niofs] or other file systems instead. "
                     + "Elasticsearch 7.15 or later uses [niofs] for the [simplefs] store type "
                     + "as it offers superior or equivalent performance to [simplefs].",

x-pack/plugin/deprecation/src/test/java/org/elasticsearch/xpack/deprecation/IndexDeprecationCheckerTests.java

@@ -546,7 +546,7 @@ public void testSimpleFSSetting() {
                 new DeprecationIssue(
                     DeprecationIssue.Level.WARNING,
                     "[simplefs] is deprecated and will be removed in future versions",
-                    "https://www.elastic.co/guide/en/elasticsearch/reference/current/index-modules-store.html",
+                    "https://ela.st/es-deprecation-7-simplefs",
                     "[simplefs] is deprecated and will be removed in 8.0. Use [niofs] or other file systems instead. "
                         + "Elasticsearch 7.15 or later uses [niofs] for the [simplefs] store type "
                         + "as it offers superior or equivalent performance to [simplefs].",