GH-11099: Do not ship javadoc web fonts for individual modules

Fixes: #11099

Web fonts use 4MB of space per "-javadoc.jar" file, for each module
shipped by the project. While those are useful when browsing the
javadoc, this project aggregates all javadocs under a single JAR and
hosts it on doc.spring.io.

This commit skips the inclusion for the individual modules' javadoc
since those are mainly used by IDEs.
The web fonts are still available for the aggregated version.

Signed-off-by: Brian Clozel <brian.clozel@broadcom.com>

**Auto-cherry-pick to `7.0.x`**

Author: bclozel

build.gradle

@@ -153,6 +153,7 @@ configure(javaProjects) { subproject ->
     tasks.withType(Javadoc) {
         options.addBooleanOption('Xdoclint:syntax', true) // only check syntax with doclint
         options.addBooleanOption('Werror', true) // fail build on Javadoc warnings
+        options.addBooleanOption('-no-fonts', true) // exclude fonts from module javadoc
     }
 
     eclipse {