Fix & improve GitHub Actions CI builds (#7784)

bazel/ray.bzl

@@ -2,15 +2,13 @@ load("@com_github_google_flatbuffers//:build_defs.bzl", "flatbuffer_library_publ
 load("@com_github_checkstyle_java//checkstyle:checkstyle.bzl", "checkstyle_test")
 load("@bazel_common//tools/maven:pom_file.bzl", "pom_file")
 
-# TODO(mehrdadn): (How to) support dynamic linking?
-PROPAGATED_WINDOWS_DEFINES = ["RAY_STATIC"]
-
 COPTS = ["-DRAY_USE_GLOG"] + select({
     "@bazel_tools//src/conditions:windows": [
-        "-DWIN32_LEAN_AND_MEAN=",  # Block the inclusion of WinSock.h, which is obsolete and causes errors
         "-Wno-builtin-macro-redefined",  # To get rid of warnings caused by deterministic build macros (e.g. #define __DATE__ "redacted")
         "-Wno-microsoft-unqualified-friend",  # This shouldn't normally be enabled, but otherwise we get: google/protobuf/map_field.h: warning: unqualified friend declaration referring to type outside of the nearest enclosing namespace is a Microsoft extension; add a nested name specifier (for: friend class DynamicMessage)
-    ] + ["-D" + define for define in PROPAGATED_WINDOWS_DEFINES],
+        # TODO(mehrdadn): (How to) support dynamic linking?
+        "-DRAY_STATIC",
+    ],
     "//conditions:default": [
     ],
 })

bazel/ray_deps_setup.bzl

@@ -240,4 +240,7 @@ def ray_deps_setup():
         build_file = True,
         url = "https://github.com/msgpack/msgpack-c/archive/8085ab8721090a447cf98bb802d1406ad7afe420.tar.gz",
         sha256 = "83c37c9ad926bbee68d564d9f53c6cbb057c1f755c264043ddd87d89e36d15bb",
+        patches = [
+            "//thirdparty/patches:msgpack-windows-iovec.patch",
+        ],
     )