Patch in a placeholder to "download" the gradle distfile from the place
where MacPorts has already downloaded it.

--- gradle/wrapper/gradle-wrapper.properties.orig    2023-02-06 15:51:42.000000000 -0600
+++ gradle/wrapper/gradle-wrapper.properties    2023-02-18 16:18:06.000000000 -0600
@@ -1,5 +1,5 @@
 #Mon Feb 06 15:51:42 CST 2023
 distributionBase=GRADLE_USER_HOME
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.5.1-bin.zip
+distributionUrl=file\://@DISTPATH@/gradle-@GRADLE_VERSION@-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists