[cmake] update pybind11 v2.10.3 to v2.12.0 (#63741)

cmake/external/pybind11.cmake

@@ -17,25 +17,11 @@ include(ExternalProject)
 set(PYBIND_PREFIX_DIR ${THIRD_PARTY_PATH}/pybind)
 set(PYBIND_SOURCE_DIR ${PYBIND_PREFIX_DIR}/src/extern_pybind)
 set(PYBIND_INCLUDE_DIR ${PYBIND_SOURCE_DIR}/include)
-set(PYBIND_TAG v2.10.3)
 set(SOURCE_DIR ${PADDLE_SOURCE_DIR}/third_party/pybind)
 set(SOURCE_INCLUDE_DIR ${SOURCE_DIR}/include)
 
 include_directories(${PYBIND_INCLUDE_DIR})
 
-set(PYBIND_PATCH_COMMAND "")
-if(NOT WIN32)
-  file(TO_NATIVE_PATH ${PADDLE_SOURCE_DIR}/patches/pybind/cast.h.patch
-       native_dst)
-  # Note: [Why calling some `git` commands before `patch`?]
-  # Paddle's CI uses cache to accelerate the make process. However, error might raise when patch codes in two scenarios:
-  # 1. Patch to the wrong version: the tag version of CI's cache falls behind PYBIND_TAG, use `git checkout ${PYBIND_TAG}` to solve this.
-  # 2. Patch twice: the tag version of cache == PYBIND_TAG, but patch has already applied to cache.
-  set(PYBIND_PATCH_COMMAND
-      git checkout -- . && git checkout ${PYBIND_TAG} && patch -Nd
-      ${SOURCE_INCLUDE_DIR}/pybind11 < ${native_dst})
-endif()
-
 ExternalProject_Add(
   extern_pybind
   ${EXTERNAL_PROJECT_LOG_ARGS} ${SHALLOW_CLONE}
@@ -47,7 +33,6 @@ ExternalProject_Add(
   # third-party library version changes cannot be incorporated.
   # reference: https://cmake.org/cmake/help/latest/module/ExternalProject.html
   UPDATE_COMMAND ""
-  PATCH_COMMAND ${PYBIND_PATCH_COMMAND}
   CONFIGURE_COMMAND ""
   # I intentionally preserved an extern_pybind/include/pybind11 directory
   # to site-packages, so that you could discern that you intended to