dynamic modules: refactor existing go sdk to prep for expansion

source/extensions/dynamic_modules/BUILD

@@ -51,6 +51,31 @@ envoy_cc_library(
     alwayslink = True,
 )
 
+# Tests that load Go SDK .so files must provide all of those symbols in the test binary's
+# symbol table; otherwise dlopen's RTLD_LAZY can't resolve them and load fails. This
+# meta-target lets a test depend on a single line and get every callback the Go SDK
+# may have referenced.
+envoy_cc_library(
+    name = "all_abi_impls",
+    deps = [
+        ":abi_impl",
+        "//source/extensions/access_loggers/dynamic_modules:access_log_lib",
+        "//source/extensions/bootstrap/dynamic_modules:abi_impl",
+        "//source/extensions/clusters/dynamic_modules:cluster_lib",
+        "//source/extensions/filters/http/dynamic_modules:abi_impl",
+        "//source/extensions/filters/http/dynamic_modules:filter_lib",
+        "//source/extensions/filters/listener/dynamic_modules:filter_lib",
+        "//source/extensions/filters/network/dynamic_modules:filter_lib",
+        "//source/extensions/filters/udp/dynamic_modules:filter_lib",
+        "//source/extensions/load_balancing_policies/dynamic_modules:abi_impl",
+        "//source/extensions/matching/input_matchers/dynamic_modules:matcher_lib",
+        "//source/extensions/tracers/dynamic_modules:abi_impl",
+        "//source/extensions/transport_sockets/tls/cert_validator/dynamic_modules:config",
+        "//source/extensions/upstreams/http/dynamic_modules:abi_impl",
+    ],
+    alwayslink = True,
+)
+
 go_library(
     name = "go_sdk_shared",
     srcs = [
@@ -59,15 +84,13 @@ go_library(
         "sdk/go/shared/network_api.go",
         "sdk/go/shared/network_base.go",
     ],
-    cgo = True,
     importpath = "github.com/envoyproxy/envoy/source/extensions/dynamic_modules/sdk/go/shared",
     visibility = ["//visibility:public"],
 )
 
 go_library(
     name = "go_sdk",
     srcs = ["sdk/go/sdk.go"],
-    cgo = True,
     importpath = "github.com/envoyproxy/envoy/source/extensions/dynamic_modules/sdk/go",
     visibility = ["//visibility:public"],
     deps = [
@@ -78,8 +101,9 @@ go_library(
 go_library(
     name = "go_sdk_abi",
     srcs = [
-        "sdk/go/abi/internal.go",
+        "sdk/go/abi/http.go",
         "sdk/go/abi/network.go",
+        "sdk/go/abi/scheduler.go",
         "//source/extensions/dynamic_modules/abi:abi.h",
     ],
     cgo = True,