[clang-format] Remove requirement that port_platform.h is at the top (grpc#36282)

Closes grpc#36282

COPYBARA_INTEGRATE_REVIEW=grpc#36282 from ctiller:port_platform-src-clang-format f1f21c7
PiperOrigin-RevId: 623689304

Author: ctiller

src/.clang-format

@@ -5,9 +5,6 @@ DerivePointerAlignment: false
 PointerAlignment: Left
 IncludeBlocks: Regroup
 IncludeCategories:
-  # port_platform.h is before almost everything
-  - Regex: '^<grpc/(support|impl/codegen)/port_platform.h>'
-    Priority: -100
   # ruby.h is even more first if it's included
   - Regex: '^<ruby/ruby.h>'
     Priority: -200

src/cpp/client/call_credentials.cc

@@ -11,10 +11,9 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-#include <grpc/support/port_platform.h>
-
 #include "absl/strings/str_cat.h"
 
+#include <grpc/support/port_platform.h>
 #include <grpcpp/security/credentials.h>
 
 #include "src/core/lib/security/credentials/credentials.h"

src/cpp/client/channel_credentials.cc

@@ -11,14 +11,13 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-#include <grpc/support/port_platform.h>
-
 #include <memory>
 #include <string>
 #include <vector>
 
 #include <grpc/grpc.h>
 #include <grpc/grpc_security.h>
+#include <grpc/support/port_platform.h>
 #include <grpcpp/security/credentials.h>
 #include <grpcpp/support/channel_arguments.h>
 

src/cpp/common/alarm.cc

@@ -15,8 +15,6 @@
 //
 //
 
-#include <grpc/support/port_platform.h>
-
 #include <atomic>
 #include <functional>
 #include <memory>
@@ -27,6 +25,7 @@
 #include <grpc/event_engine/event_engine.h>
 #include <grpc/grpc.h>
 #include <grpc/support/log.h>
+#include <grpc/support/port_platform.h>
 #include <grpc/support/sync.h>
 #include <grpc/support/time.h>
 #include <grpcpp/alarm.h>

src/cpp/ext/csm/csm_observability.cc

@@ -16,8 +16,6 @@
 //
 //
 
-#include <grpc/support/port_platform.h>
-
 #include "src/cpp/ext/csm/csm_observability.h"
 
 #include <memory>
@@ -33,6 +31,7 @@
 #include "opentelemetry/sdk/resource/resource_detector.h"
 
 #include <grpc/support/log.h>
+#include <grpc/support/port_platform.h>
 #include <grpcpp/ext/csm_observability.h>
 
 #include "src/core/ext/xds/xds_enabled_server.h"

src/cpp/ext/csm/csm_observability.h

@@ -19,10 +19,10 @@
 #ifndef GRPC_SRC_CPP_EXT_CSM_CSM_OBSERVABILITY_H
 #define GRPC_SRC_CPP_EXT_CSM_CSM_OBSERVABILITY_H
 
-#include <grpc/support/port_platform.h>
-
 #include "absl/strings/string_view.h"
 
+#include <grpc/support/port_platform.h>
+
 #include "src/core/lib/channel/channel_args.h"
 
 namespace grpc {

src/cpp/ext/csm/metadata_exchange.cc

@@ -16,8 +16,6 @@
 //
 //
 
-#include <grpc/support/port_platform.h>
-
 #include "src/cpp/ext/csm/metadata_exchange.h"
 
 #include <stddef.h>
@@ -38,6 +36,7 @@
 #include "upb/base/string_view.h"
 
 #include <grpc/slice.h>
+#include <grpc/support/port_platform.h>
 
 #include "src/core/lib/channel/call_tracer.h"
 #include "src/core/lib/gprpp/env.h"

src/cpp/ext/csm/metadata_exchange.h

@@ -19,8 +19,6 @@
 #ifndef GRPC_SRC_CPP_EXT_CSM_METADATA_EXCHANGE_H
 #define GRPC_SRC_CPP_EXT_CSM_METADATA_EXCHANGE_H
 
-#include <grpc/support/port_platform.h>
-
 #include <memory>
 #include <string>
 #include <utility>
@@ -31,6 +29,8 @@
 #include "opentelemetry/sdk/common/attribute_utils.h"
 #include "upb/mem/arena.hpp"
 
+#include <grpc/support/port_platform.h>
+
 #include "src/core/lib/slice/slice.h"
 #include "src/core/lib/transport/metadata_batch.h"
 #include "src/cpp/ext/otel/otel_plugin.h"

src/cpp/ext/filters/census/client_filter.cc

@@ -16,8 +16,6 @@
 //
 //
 
-#include <grpc/support/port_platform.h>
-
 #include "src/cpp/ext/filters/census/client_filter.h"
 
 #include <stddef.h>
@@ -46,6 +44,7 @@
 
 #include <grpc/slice.h>
 #include <grpc/support/log.h>
+#include <grpc/support/port_platform.h>
 #include <grpc/support/time.h>
 #include <grpcpp/client_context.h>
 #include <grpcpp/opencensus.h>

src/cpp/ext/filters/census/client_filter.h

@@ -19,10 +19,9 @@
 #ifndef GRPC_SRC_CPP_EXT_FILTERS_CENSUS_CLIENT_FILTER_H
 #define GRPC_SRC_CPP_EXT_FILTERS_CENSUS_CLIENT_FILTER_H
 
-#include <grpc/support/port_platform.h>
-
 #include "absl/status/statusor.h"
 
+#include <grpc/support/port_platform.h>
 #include <grpcpp/support/client_interceptor.h>
 #include <grpcpp/support/interceptor.h>