Fix use of spaces on Windows if JAVA_HOME not set

When JAVA_HOME is not set we try to detect the location of Java. If its
location contains a space, due to a lack of quoting we will be
unsuccessful in invoking Java. This commit adds the necessary quoting to
handle this case.

Relates #23822

distribution/src/main/resources/bin/elasticsearch.in.bat

@@ -3,7 +3,7 @@
 IF DEFINED JAVA_HOME (
   set JAVA="%JAVA_HOME%\bin\java.exe"
 ) ELSE (
-  FOR %%I IN (java.exe) DO set JAVA=%%~$PATH:I
+  FOR %%I IN (java.exe) DO set JAVA="%%~$PATH:I"
 )
 IF NOT EXIST %JAVA% (
   ECHO Could not find any executable java binary. Please install java in your PATH or set JAVA_HOME 1>&2