Fix typo 'Elastisearch' -> 'Elasticsearch' (#23633)

Corrects `Elastisearch` to `Elasticsearch` in some docs and a packaging test utility.

docs/reference/setup/install/deb.asciidoc

@@ -114,7 +114,7 @@ endif::[]
 
 ifeval::["{release-state}"!="unreleased"]
 
-The Debian package for Elastisearch v{version} can be downloaded from the website and installed as follows:
+The Debian package for Elasticsearch v{version} can be downloaded from the website and installed as follows:
 
 ["source","sh",subs="attributes"]
 --------------------------------------------

docs/reference/setup/install/rpm.asciidoc

@@ -99,7 +99,7 @@ endif::[]
 
 ifeval::["{release-state}"!="unreleased"]
 
-The RPM for Elastisearch v{version} can be downloaded from the website and installed as follows:
+The RPM for Elasticsearch v{version} can be downloaded from the website and installed as follows:
 
 ["source","sh",subs="attributes"]
 --------------------------------------------

qa/vagrant/src/test/resources/packaging/utils/utils.bash

@@ -435,7 +435,7 @@ wait_for_elasticsearch_status() {
     if [ $? -eq 0 ]; then
         echo "Connected"
     else
-        echo "Unable to connect to Elastisearch"
+        echo "Unable to connect to Elasticsearch"
         false
     fi