Bump protobuf from 4.23.3 to 4.23.4 in /tests

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from 4.23.3 to 4.23.4.
- [Release notes](https://github.com/protocolbuffers/protobuf/releases)
- [Changelog](https://github.com/protocolbuffers/protobuf/blob/main/protobuf_release.bzl)
- [Commits](protocolbuffers/protobuf@v4.23.3...v4.23.4)

---
updated-dependencies:
- dependency-name: protobuf
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

tests/requirements.txt

@@ -350,20 +350,20 @@ pluggy==1.2.0 \
     # via
     #   -r requirements.txt
     #   pytest
-protobuf==4.23.3 \
-    --hash=sha256:0149053336a466e3e0b040e54d0b615fc71de86da66791c592cc3c8d18150bf8 \
-    --hash=sha256:08fe19d267608d438aa37019236db02b306e33f6b9902c3163838b8e75970223 \
-    --hash=sha256:29660574cd769f2324a57fb78127cda59327eb6664381ecfe1c69731b83e8288 \
-    --hash=sha256:2991f5e7690dab569f8f81702e6700e7364cc3b5e572725098215d3da5ccc6ac \
-    --hash=sha256:3b01a5274ac920feb75d0b372d901524f7e3ad39c63b1a2d55043f3887afe0c1 \
-    --hash=sha256:3bcbeb2bf4bb61fe960dd6e005801a23a43578200ea8ceb726d1f6bd0e562ba1 \
-    --hash=sha256:447b9786ac8e50ae72cae7a2eec5c5df6a9dbf9aa6f908f1b8bda6032644ea62 \
-    --hash=sha256:514b6bbd54a41ca50c86dd5ad6488afe9505901b3557c5e0f7823a0cf67106fb \
-    --hash=sha256:5cb9e41188737f321f4fce9a4337bf40a5414b8d03227e1d9fbc59bc3a216e35 \
-    --hash=sha256:7a92beb30600332a52cdadbedb40d33fd7c8a0d7f549c440347bc606fb3fe34b \
-    --hash=sha256:84ea0bd90c2fdd70ddd9f3d3fc0197cc24ecec1345856c2b5ba70e4d99815359 \
-    --hash=sha256:aca6e86a08c5c5962f55eac9b5bd6fce6ed98645d77e8bfc2b952ecd4a8e4f6a \
-    --hash=sha256:cc14358a8742c4e06b1bfe4be1afbdf5c9f6bd094dff3e14edb78a1513893ff5
+protobuf==4.23.4 \
+    --hash=sha256:0a5759f5696895de8cc913f084e27fd4125e8fb0914bb729a17816a33819f474 \
+    --hash=sha256:351cc90f7d10839c480aeb9b870a211e322bf05f6ab3f55fcb2f51331f80a7d2 \
+    --hash=sha256:5fea3c64d41ea5ecf5697b83e41d09b9589e6f20b677ab3c48e5f242d9b7897b \
+    --hash=sha256:6dd9b9940e3f17077e820b75851126615ee38643c2c5332aa7a359988820c720 \
+    --hash=sha256:7b19b6266d92ca6a2a87effa88ecc4af73ebc5cfde194dc737cf8ef23a9a3b12 \
+    --hash=sha256:8547bf44fe8cec3c69e3042f5c4fb3e36eb2a7a013bb0a44c018fc1e427aafbd \
+    --hash=sha256:9053df6df8e5a76c84339ee4a9f5a2661ceee4a0dab019e8663c50ba324208b0 \
+    --hash=sha256:c3e0939433c40796ca4cfc0fac08af50b00eb66a40bbbc5dee711998fb0bbc1e \
+    --hash=sha256:ccd9430c0719dce806b93f89c91de7977304729e55377f872a92465d548329a9 \
+    --hash=sha256:e1c915778d8ced71e26fcf43c0866d7499891bca14c4368448a82edc61fdbc70 \
+    --hash=sha256:e9d0be5bf34b275b9f87ba7407796556abeeba635455d036c7351f7c183ef8ff \
+    --hash=sha256:effeac51ab79332d44fba74660d40ae79985901ac21bca408f8dc335a81aa597 \
+    --hash=sha256:fee88269a090ada09ca63551bf2f573eb2424035bcf2cb1b121895b01a46594a
     # via
     #   -r requirements.txt
     #   grpcio-tools