Fix standalone build for 3.11

Starting 3.11, only java 21 gerrit builds are being published even
though it is possible to build with both 17 and 21. For standalone build
to work, it is required to fetch approprite gerrit plugin api built with
java 17 which is not readily available. Hence, make it possible to build
with 21 using `--config=java21` flag on bazel commands.

Change-Id: I4fb7d37aa1aeb5250df6ca8c29c96c28fa01eb72

.bazelrc

diff --git a/.bazelrc b/.bazelrc
index 337d67c..d172950 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -5,3 +5,10 @@
 build --java_runtime_version=remotejdk_17
 build --tool_java_language_version=17
 build --tool_java_runtime_version=remotejdk_17
+
+build:build_java21_shared --java_language_version=21
+build:build_java21_shared --java_runtime_version=remotejdk_21
+build:build_java21_shared --tool_java_language_version=21
+build:build_java21_shared --tool_java_runtime_version=remotejdk_21
+
+build:java21 --config=build_java21_shared
\ No newline at end of file

.bazelversion

diff --git a/.bazelversion b/.bazelversion
index f9da12e..4122521 100644
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-6.3.2
\ No newline at end of file
+7.0.0
\ No newline at end of file

WORKSPACE

diff --git a/WORKSPACE b/WORKSPACE
index e0ebae7..06468c2 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "f930de7dc62e319c82d2afc8f10efd1290fd62b8",
+    commit = "e3a8273dbfced5c41f6f08f49d063c4366be0278",
     #local_path = "/home/<user>/projects/bazlets",
 )