Upgrade to protobuf 33.4 (#12615)

Per https://github.com/protocolbuffers/protobuf/releases

```
okshiva@okshiva-mac2 grpc-java % curl -sL https://github.com/protocolbuffers/protobuf/releases/download/v33.4/protobuf-33.4.tar.gz | shasum -a 256
bc670a4e34992c175137ddda24e76562bb928f849d712a0e3c2fb2e19249bea1
```

Author: shivaspeaks

MODULE.bazel

@@ -50,7 +50,7 @@ bazel_dep(name = "bazel_jar_jar", version = "0.1.11.bcr.1")
 bazel_dep(name = "bazel_skylib", version = "1.7.1")
 bazel_dep(name = "googleapis", version = "0.0.0-20240326-1c8d509c5", repo_name = "com_google_googleapis")
 bazel_dep(name = "grpc-proto", version = "0.0.0-20240627-ec30f58.bcr.1", repo_name = "io_grpc_grpc_proto")
-bazel_dep(name = "protobuf", version = "33.1", repo_name = "com_google_protobuf")
+bazel_dep(name = "protobuf", version = "33.4", repo_name = "com_google_protobuf")
 bazel_dep(name = "rules_cc", version = "0.0.9")
 bazel_dep(name = "rules_java", version = "9.1.0")
 bazel_dep(name = "rules_jvm_external", version = "6.0")

buildscripts/kokoro/windows32.bat

@@ -25,7 +25,7 @@ cd "%WORKSPACE%"
 
 SET TARGET_ARCH=x86_32
 SET FAIL_ON_WARNINGS=true
-SET PROTOBUF_VER=33.1
+SET PROTOBUF_VER=33.4
 SET PKG_CONFIG_PATH=%ESCWORKSPACE%\\grpc-java-helper32\\protobuf-%PROTOBUF_VER%\\build\\protobuf-%PROTOBUF_VER%\\lib\\pkgconfig
 SET VC_PROTOBUF_LIBS=/LIBPATH:%ESCWORKSPACE%\\grpc-java-helper32\\protobuf-%PROTOBUF_VER%\\build\\protobuf-%PROTOBUF_VER%\\lib
 SET VC_PROTOBUF_INCLUDE=%ESCWORKSPACE%\\grpc-java-helper32\\protobuf-%PROTOBUF_VER%\\build\\protobuf-%PROTOBUF_VER%\\include

buildscripts/kokoro/windows64.bat

@@ -24,7 +24,7 @@ cd "%WORKSPACE%"
 
 SET TARGET_ARCH=x86_64
 SET FAIL_ON_WARNINGS=true
-SET PROTOBUF_VER=33.1
+SET PROTOBUF_VER=33.4
 SET PKG_CONFIG_PATH=%ESCWORKSPACE%\\grpc-java-helper64\\protobuf-%PROTOBUF_VER%\\build\\protobuf-%PROTOBUF_VER%\\lib\\pkgconfig
 SET VC_PROTOBUF_LIBS=/LIBPATH:%ESCWORKSPACE%\\grpc-java-helper64\\protobuf-%PROTOBUF_VER%\\build\\protobuf-%PROTOBUF_VER%\\lib
 SET VC_PROTOBUF_INCLUDE=%ESCWORKSPACE%\\grpc-java-helper64\\protobuf-%PROTOBUF_VER%\\build\\protobuf-%PROTOBUF_VER%\\include

buildscripts/make_dependencies.bat

@@ -1,7 +1,7 @@
 choco install -y pkgconfiglite
 choco install -y openjdk --version=17.0
 set PATH=%PATH%;"c:\Program Files\OpenJDK\jdk-17\bin"
-set PROTOBUF_VER=33.1
+set PROTOBUF_VER=33.4
 set ABSL_VERSION=20250127.1
 set CMAKE_NAME=cmake-3.26.3-windows-x86_64
 

buildscripts/make_dependencies.sh

@@ -3,7 +3,7 @@
 # Build protoc
 set -evux -o pipefail
 
-PROTOBUF_VERSION=33.1
+PROTOBUF_VERSION=33.4
 ABSL_VERSION=20250127.1
 
 # ARCH is x86_64 bit unless otherwise specified.

repositories.bzl

@@ -116,9 +116,9 @@ def com_google_protobuf():
     # This statement defines the @com_google_protobuf repo.
     http_archive(
         name = "com_google_protobuf",
-        sha256 = "fda132cb0c86400381c0af1fe98bd0f775cb566cb247cdcc105e344e00acc30e",
-        strip_prefix = "protobuf-33.1",
-        urls = ["https://github.com/protocolbuffers/protobuf/releases/download/v33.1/protobuf-33.1.tar.gz"],
+        sha256 = "bc670a4e34992c175137ddda24e76562bb928f849d712a0e3c2fb2e19249bea1",
+        strip_prefix = "protobuf-33.4",
+        urls = ["https://github.com/protocolbuffers/protobuf/releases/download/v33.4/protobuf-33.4.tar.gz"],
     )
 
 def io_grpc_grpc_proto():