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/dump_manager_main.cpp b/dump_manager_main.cpp
index 402cea3..68b0bc0 100644
--- a/dump_manager_main.cpp
+++ b/dump_manager_main.cpp
@@ -9,9 +9,8 @@
 #include "watch.hpp"
 #include "xyz/openbmc_project/Common/error.hpp"
 
-#include <fmt/core.h>
-
 #include <phosphor-logging/elog-errors.hpp>
+#include <phosphor-logging/lg2.hpp>
 #include <sdbusplus/bus.hpp>
 
 #include <memory>
@@ -28,10 +27,8 @@
     auto rc = sd_event_default(&event);
     if (rc < 0)
     {
-        log<level::ERR>(
-            fmt::format("Error occurred during the sd_event_default, rc({})",
-                        rc)
-                .c_str());
+        lg2::error("Error occurred during the sd_event_default, rc: {RC}", "RC",
+                   rc);
         report<InternalFailure>();
         return rc;
     }
@@ -42,25 +39,22 @@
     sigset_t mask;
     if (sigemptyset(&mask) < 0)
     {
-        log<level::ERR>(
-            fmt::format("Unable to initialize signal set, errno({})", errno)
-                .c_str());
+        lg2::error("Unable to initialize signal set, errno: {ERRNO}", "ERRNO",
+                   errno);
         return EXIT_FAILURE;
     }
 
     if (sigaddset(&mask, SIGCHLD) < 0)
     {
-        log<level::ERR>(
-            fmt::format("Unable to add signal to signal set, errno({})", errno)
-                .c_str());
+        lg2::error("Unable to add signal to signal set, errno: {ERRNO}",
+                   "ERRNO", errno);
         return EXIT_FAILURE;
     }
 
     // Block SIGCHLD first, so that the event loop can handle it
     if (sigprocmask(SIG_BLOCK, &mask, nullptr) < 0)
     {
-        log<level::ERR>(
-            fmt::format("Unable to block signal, errno({})", errno).c_str());
+        lg2::error("Unable to block signal, errno: {ERRNO}", "ERRNO", errno);
         return EXIT_FAILURE;
     }
 
@@ -102,10 +96,8 @@
         auto rc = sd_event_loop(eventP.get());
         if (rc < 0)
         {
-            log<level::ERR>(
-                fmt::format("Error occurred during the sd_event_loop, rc({})",
-                            rc)
-                    .c_str());
+            lg2::error("Error occurred during the sd_event_loop, rc: {RC}",
+                       "RC", rc);
             elog<InternalFailure>();
         }
     }