Revert "Revert "server: introduce ServerMetricRecorder API and move p…

…er-call reporting from a C++ interceptor to a C-core filter (#32106)" (#32272)" (#32279)

* Revert "Revert "server: introduce ServerMetricRecorder API and move per-call reporting from a C++ interceptor to a C-core filter (#32106)" (#32272)"

This reverts commit deb1e25.

* Fix by caching call metric recording stuff in async request

PR #32106 caused msan errors in some tests while de-referencing the
server object where async calls are active after the server is
destroyed. Instead cache the ServerMetricRecorder pointer.

* copyright headers fixed

* clang fixes.

BUILD

@@ -762,6 +762,7 @@ grpc_cc_library(
         "grpc_base",
         # standard plugins
         "census",
+        "//src/core:grpc_backend_metric_filter",
         "//src/core:grpc_deadline_filter",
         "//src/core:grpc_client_authority_filter",
         "//src/core:grpc_lb_policy_grpclb",
@@ -1823,6 +1824,7 @@ grpc_cc_library(
         "grpc_security_base",
         "grpc_service_config_impl",
         "grpc_trace",
+        "grpcpp_backend_metric_recorder",
         "grpcpp_call_metric_recorder",
         "grpcpp_status",
         "iomgr_timer",
@@ -1838,6 +1840,7 @@ grpc_cc_library(
         "//src/core:error",
         "//src/core:gpr_atm",
         "//src/core:gpr_manual_constructor",
+        "//src/core:grpc_backend_metric_provider",
         "//src/core:grpc_service_config",
         "//src/core:grpc_transport_inproc",
         "//src/core:json",
@@ -1890,6 +1893,7 @@ grpc_cc_library(
         "grpc_service_config_impl",
         "grpc_trace",
         "grpc_unsecure",
+        "grpcpp_backend_metric_recorder",
         "grpcpp_call_metric_recorder",
         "grpcpp_status",
         "iomgr_timer",
@@ -1901,6 +1905,7 @@ grpc_cc_library(
         "//src/core:error",
         "//src/core:gpr_atm",
         "//src/core:gpr_manual_constructor",
+        "//src/core:grpc_backend_metric_provider",
         "//src/core:grpc_insecure_credentials",
         "//src/core:grpc_service_config",
         "//src/core:grpc_transport_inproc",
@@ -1978,45 +1983,42 @@ grpc_cc_library(
 
 grpc_cc_library(
     name = "grpcpp_call_metric_recorder",
-    srcs = [
-        "src/cpp/server/orca/call_metric_recorder.cc",
-    ],
     external_deps = [
         "absl/strings",
         "absl/types:optional",
-        "upb_lib",
     ],
     language = "c++",
     public_hdrs = [
         "include/grpcpp/ext/call_metric_recorder.h",
     ],
     visibility = ["@grpc:public"],
-    deps = [
-        "grpc++_public_hdrs",
-        "xds_orca_upb",
-        "//src/core:arena",
-        "//src/core:grpc_backend_metric_data",
-    ],
+    deps = ["grpc++_public_hdrs"],
 )
 
 grpc_cc_library(
-    name = "grpcpp_orca_interceptor",
+    name = "grpcpp_backend_metric_recorder",
     srcs = [
-        "src/cpp/server/orca/orca_interceptor.cc",
+        "src/cpp/server/backend_metric_recorder.cc",
     ],
     hdrs = [
-        "src/cpp/server/orca/orca_interceptor.h",
+        "src/cpp/server/backend_metric_recorder.h",
     ],
     external_deps = [
+        "absl/base:core_headers",
         "absl/strings",
-        "absl/types:optional",
     ],
     language = "c++",
+    public_hdrs = [
+        "include/grpcpp/ext/server_metric_recorder.h",
+    ],
     visibility = ["@grpc:public"],
     deps = [
-        "grpc++",
-        "grpc_base",
+        "gpr",
+        "grpc++_public_hdrs",
+        "grpc_trace",
         "grpcpp_call_metric_recorder",
+        "//src/core:grpc_backend_metric_data",
+        "//src/core:grpc_backend_metric_provider",
     ],
 )
 
@@ -2027,6 +2029,7 @@ grpc_cc_library(
     ],
     external_deps = [
         "absl/base:core_headers",
+        "absl/strings",
         "absl/time",
         "absl/types:optional",
         "upb_lib",
@@ -2042,11 +2045,13 @@ grpc_cc_library(
         "gpr",
         "grpc++",
         "grpc_base",
+        "grpcpp_backend_metric_recorder",
         "protobuf_duration_upb",
         "ref_counted_ptr",
         "xds_orca_service_upb",
         "xds_orca_upb",
         "//src/core:default_event_engine",
+        "//src/core:grpc_backend_metric_data",
         "//src/core:ref_counted",
         "//src/core:time",
     ],