update grpc version (#7457)

* update grpc version

this in turn updates the upb version, which fixes Flatbuffers' failure in Bazel CI: https://buildkite.com/bazel/bazel-at-head-plus-downstream/builds/2586#0182a995-a528-4e87-90a0-1604a5e9f7eb

* also update rules_go version

* the new rules_go actually needs a version

* grpc_extra_deps() also registers go toolchains

* make buildifier happy

* address review comments
diff --git a/WORKSPACE b/WORKSPACE
index 26c7226..b707857 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -33,19 +33,17 @@
 
 http_archive(
     name = "io_bazel_rules_go",
-    sha256 = "d1ffd055969c8f8d431e2d439813e42326961d0942bdf734d2c95dc30c369566",
+    sha256 = "16e9fca53ed6bd4ff4ad76facc9b7b651a89db1689a2877d6fd7b82aa824e366",
     urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.24.5/rules_go-v0.24.5.tar.gz",
-        "https://github.com/bazelbuild/rules_go/releases/download/v0.24.5/rules_go-v0.24.5.tar.gz",
+        "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.34.0/rules_go-v0.34.0.zip",
+        "https://github.com/bazelbuild/rules_go/releases/download/v0.34.0/rules_go-v0.34.0.zip",
     ],
 )
 
-load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_dependencies")
+load("@io_bazel_rules_go//go:deps.bzl", "go_rules_dependencies")
 
 go_rules_dependencies()
 
-go_register_toolchains()
-
 ##### Protobuf
 _PROTOBUF_VERSION = "3.15.2"
 
@@ -58,12 +56,12 @@
 )
 
 ##### GRPC
-_GRPC_VERSION = "1.42.0"
+_GRPC_VERSION = "1.48.0"  # https://github.com/grpc/grpc/releases/tag/v1.48.0
 
 http_archive(
     name = "com_github_grpc_grpc",
     strip_prefix = "grpc-" + _GRPC_VERSION,
-    urls = ["https://github.com/grpc/grpc/archive/v" + _GRPC_VERSION + ".tar.gz"],
+    urls = ["https://github.com/grpc/grpc/archive/refs/tags/v" + _GRPC_VERSION + ".tar.gz"],
 )
 
 load("@com_github_grpc_grpc//bazel:grpc_deps.bzl", "grpc_deps")
@@ -74,6 +72,7 @@
 
 grpc_extra_deps()
 
+# rules_go from https://github.com/bazelbuild/rules_go/releases/tag/v0.34.0
 http_archive(
     name = "build_bazel_rules_nodejs",
     sha256 = "965ee2492a2b087cf9e0f2ca472aeaf1be2eb650e0cfbddf514b9a7d3ea4b02a",