[chore](submodule) align clucene submodule branch with doris branch-2.1 (#47268)

Author: airborne12

.gitmodules

@@ -23,4 +23,4 @@
 [submodule "be/src/clucene"]
 	path = be/src/clucene
 	url = https://github.com/apache/doris-thirdparty.git
-	branch = clucene
+	branch = clucene-2.1

build.sh

@@ -504,7 +504,7 @@ FE_MODULES="$(
 # Clean and build Backend
 if [[ "${BUILD_BE}" -eq 1 ]]; then
     update_submodule "be/src/apache-orc" "apache-orc" "https://github.com/apache/doris-thirdparty/archive/refs/heads/orc.tar.gz"
-    update_submodule "be/src/clucene" "clucene" "https://github.com/apache/doris-thirdparty/archive/refs/heads/clucene.tar.gz"
+    update_submodule "be/src/clucene" "clucene" "https://github.com/apache/doris-thirdparty/archive/refs/heads/clucene-2.1.tar.gz"
     if [[ -e "${DORIS_HOME}/gensrc/build/gen_cpp/version.h" ]]; then
         rm -f "${DORIS_HOME}/gensrc/build/gen_cpp/version.h"
     fi