CLDR-17918 build: use mvn settings from CLDR

- piggyback on cldr/.github/workflows/mvn-settings.xml for building
- add MVN_OPTS variable in the json build script

Author: srl295

.github/workflows/build-json.yml

@@ -87,7 +87,7 @@ jobs:
                 rm -rf cldr-json
                 echo "::endgroup::"
                 echo "::group::Build"
-                bash cldr-generate-json.sh
+                bash MVN_OPTS="-s cldr/.github/workflows/mvn-settings.xml" cldr-generate-json.sh
                 echo "::endgroup::"
                 echo "::group::Status"
                 git status || true

cldr-generate-json.sh

@@ -22,7 +22,7 @@ fi
 mkdir -p -v ${OUT} ${INDATA}/seed/main ${INDATA}/seed/annotations ${DIST}
 MAIN_CLASS=org.unicode.cldr.json.Ldml2JsonConverter
 export MAVEN_OPTS="-Xmx16384m -Dexec.cleanupDaemonThreads=false -Dexec.mainClass=${MAIN_CLASS}"
-MVN="mvn --file=${CLDR_DIR}/tools/pom.xml -pl cldr-code"
+MVN="mvn ${MVN_OPTS} --file=${CLDR_DIR}/tools/pom.xml -pl cldr-code"
 MVN_COMPILE="${MVN} compile"
 MVN_EXEC="${MVN} -DCLDR_DIR=${INDATA} exec:java"