Implementing Phosphor-Logging/LG2 logging

This commit introduces changes in the phosphor-debug-collector
repository to implement structured logging using the LG2
framework. The existing log calls in the repository,
have been replaced with LG2 logging, facilitates better
log tracking and troubleshooting by offering improved
detail in JSON object values.

Test:
- Created BMC dump
- Created system dump

Here is a example
{
	"_EXE" : "/tmp/phosphor-dump-manager",
	"_MACHINE_ID" : "f9ca96d99c7b4ba688556f632ffeff5d",
	"_CAP_EFFECTIVE" : "1ffffffffff",
	"LOG2_FMTMSG" : "Invalid Dump file name, FILENAME: {FILENAME}",
	"__CURSOR" : "s=721ae7a5b6ed43ec904f2bb03e3c0403;i=2a8d0;\
b=b372b9a5989e46bb8e62b33310e181ea;m=2c05fda2b;t=5fdf0684c1e70;x=1592f60584d6486c",
	"CODE_FUNC" : "void phosphor::dump::bmc::Manager::\
createEntry(const std::filesystem::__cxx11::path&)",
	"_SYSTEMD_SLICE" : "system-dropbear.slice",
	"CODE_LINE" : "174",
	"__REALTIME_TIMESTAMP" : "1686583867350640",
	"PRIORITY" : "3",
	"_SYSTEMD_UNIT" : "dropbear@1-9.3.29.238:22-9.3.84.138:45432.service",
	"_PID" : "16209",
	"_BOOT_ID" : "b372b9a5989e46bb8e62b33310e181ea",
	"_SOURCE_REALTIME_TIMESTAMP" : "1686583867350580",
	"_TRANSPORT" : "journal",
	"_HOSTNAME" : "openbmc",
	"SYSLOG_IDENTIFIER" : "phosphor-dump-manager",
	"MESSAGE" : "Invalid Dump file name, \
FILENAME: BMCDUMP.XXXXXXX.0000006.20230612153010",
	"CODE_FILE" : \
"/usr/src/debug/phosphor-debug-collector/1.0+gitAUTOINC+a17f1c92ce-r1\
/dump_manager_bmc.cpp",
	"_UID" : "0",
	"_CMDLINE" : "/tmp/phosphor-dump-manager",
	"_RUNTIME_SCOPE" : "system",
	"FILENAME" : "BMCDUMP.XXXXXXXX.0000006.20230612153010",
	"_SYSTEMD_INVOCATION_ID" : "64a11629aade4c96ab62154cbc4be8b7",
	"__MONOTONIC_TIMESTAMP" : "11817441835",
	"_SYSTEMD_CGROUP" : "/system.slice/system-dropbear.slice/\
dropbear@1-9.3.29.238:22-9.3.84.138:45432.service",
	"_COMM" : "phosphor-dump-m",
	"_GID" : "0"
}

Change-Id: I3a52b812b059b64d945493de2e2cc68a43f6d72a
Signed-off-by: Dhruvaraj Subhashchandran <dhruvaraj@in.ibm.com>
diff --git a/watch.cpp b/watch.cpp
index fcf46bd..37a0b6a 100644
--- a/watch.cpp
+++ b/watch.cpp
@@ -2,9 +2,8 @@
 
 #include "xyz/openbmc_project/Common/error.hpp"
 
-#include <fmt/core.h>
-
 #include <phosphor-logging/elog-errors.hpp>
+#include <phosphor-logging/lg2.hpp>
 
 namespace phosphor
 {
@@ -35,9 +34,8 @@
     // Check if watch DIR exists.
     if (!std::filesystem::is_directory(path))
     {
-        log<level::ERR>(
-            fmt::format("Watch directory doesn't exist, DIR({})", path.c_str())
-                .c_str());
+        lg2::error("Watch directory doesn't exist, DIR: {DIRECTORY}",
+                   "DIRECTORY", path);
         elog<InternalFailure>();
     }
 
@@ -45,11 +43,9 @@
     if (-1 == wd)
     {
         auto error = errno;
-        log<level::ERR>(
-            fmt::format(
-                "Error occurred during the inotify_add_watch call, errno({})",
-                error)
-                .c_str());
+        lg2::error(
+            "Error occurred during the inotify_add_watch call, errno: {ERRNO}",
+            "ERRNO", error);
         elog<InternalFailure>();
     }
 
@@ -58,10 +54,8 @@
     if (0 > rc)
     {
         // Failed to add to event loop
-        log<level::ERR>(
-            fmt::format(
-                "Error occurred during the sd_event_add_io call, rc({})", rc)
-                .c_str());
+        lg2::error("Error occurred during the sd_event_add_io call, rc: {RC}",
+                   "RC", rc);
         elog<InternalFailure>();
     }
 }
@@ -73,10 +67,8 @@
     if (-1 == fd)
     {
         auto error = errno;
-        log<level::ERR>(
-            fmt::format("Error occurred during the inotify_init1, errno({})",
-                        error)
-                .c_str());
+        lg2::error("Error occurred during the inotify_init1, errno: {ERRNO}",
+                   "ERRNO", error);
         elog<InternalFailure>();
     }
 
@@ -102,9 +94,8 @@
         // Failed to read inotify event
         // Report error and return
         auto error = errno;
-        log<level::ERR>(
-            fmt::format("Error occurred during the read, errno({})", error)
-                .c_str());
+        lg2::error("Error occurred during the read, errno: {ERRNO}", "ERRNO",
+                   error);
         report<InternalFailure>();
         return 0;
     }