[Accton][m4052actm] Add/Modify FBOSS related files to support new m4052actm platform

Description:

Summary:

1. Introduce initial code for the new m4052actm platform.

2. Follow guidelines from "Config-Driven Platform Support" in [New Platform Support](https://github.com/facebook/fboss/blob/main/docs/docs/developing/new_platform_support.md#config-driven-platform-support-recommended).

3. Verified build with "--cmake-target fboss_fake_agent_targets"

Test Plan: Imported from GitHub, without a `Test Plan:` line.

Author: nickhuang202

fboss/agent/platforms/common/PlatformMappingUtils.cpp

@@ -200,6 +200,7 @@ std::unique_ptr<PlatformMapping> initPlatformMapping(PlatformType type) {
           : std::make_unique<Icecube800banwPlatformMapping>(platformMappingStr);
     case PlatformType::PLATFORM_WEDGE800BACT:
     case PlatformType::PLATFORM_WEDGE800BNHP:
+    case PlatformType::PLATFORM_M4052ACTM:
       // Wedge800BACT/Wedge800BNHP no longer ship a compiled-in platform
       // mapping. The mapping must be provided externally via
       // --platform_descriptor_config_path or --platform_mapping_override_path.

fboss/lib/if/fboss_common.thrift

@@ -68,6 +68,7 @@ enum PlatformType {
   PLATFORM_M4062NHP = 53,
   PLATFORM_WEDGE800BNHP = 54,
   PLATFORM_M5120CSC = 55,
+  PLATFORM_M4052ACTM = 56,
   PLATFORM_UNKNOWN = 1000, # Placeholder for unknown platform type
 }
 

fboss/lib/platform_mapping_v2/generated_platform_mappings/accton/m4052actm/platform_descriptor.json

@@ -0,0 +1,10 @@
+{
+  "platformType": 56,
+  "productNamePrefixes": [
+    "M4052ACTM"
+  ],
+  "modeNames": [
+    "m4052actm"
+  ],
+  "asicType": 13
+}