[build] Update Gazelle bazel dependency (#36745)

Closes #36745

COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36745 from drfloob:update-gazelle 4fba6f7b09
PiperOrigin-RevId: 638067497

bazel/grpc_deps.bzl

@@ -406,10 +406,10 @@ def grpc_deps():
     if "bazel_gazelle" not in native.existing_rules():
         http_archive(
             name = "bazel_gazelle",
-            sha256 = "de69a09dc70417580aabf20a28619bb3ef60d038470c7cf8442fafcf627c21cb",
+            sha256 = "d76bf7a60fd8b050444090dfa2837a4eaf9829e1165618ee35dceca5cbdf58d5",
             urls = [
-                "https://mirror.bazel.build/github.com/bazelbuild/bazel-gazelle/releases/download/v0.24.0/bazel-gazelle-v0.24.0.tar.gz",
-                "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.24.0/bazel-gazelle-v0.24.0.tar.gz",
+                "https://mirror.bazel.build/github.com/bazelbuild/bazel-gazelle/releases/download/v0.37.0/bazel-gazelle-v0.37.0.tar.gz",
+                "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.37.0/bazel-gazelle-v0.37.0.tar.gz",
             ],
         )
 

bazel/grpc_extra_deps.bzl

@@ -52,7 +52,7 @@ def grpc_extra_deps(ignore_version_differences = False):
     api_dependencies()
 
     go_rules_dependencies()
-    go_register_toolchains(version = "1.18")
+    go_register_toolchains(version = "1.20")
     gazelle_dependencies()
 
     # Pull-in the go 3rd party dependencies for protoc_gen_validate, which is