fix index out-of-bounds in startAttachingCrashLogMessages (#3123)

Task/Issue URL: https://app.asana.com/0/414709148257752/1207877553454228/f
BSK PR: duckduckgo/BrowserServicesKit#906

Description:

Fixes Out-of-bounds exception when no records in crashDiagnostics array
Rollback crash collection in C++ exception handler
Steps to test this PR:

Simulate a crash in App Store target with debugger detached
Set a breakpoint at CrashCollection.swift:122 and remove items from crashDiagnostics array (using LLDB: po crashDiagnostics.removeAll())
validate the code is not crashing when adding a record to the array

DuckDuckGo.xcodeproj/project.pbxproj

@@ -10118,7 +10118,7 @@
 			repositoryURL = "https://github.com/DuckDuckGo/BrowserServicesKit";
 			requirement = {
 				kind = exactVersion;
-				version = 171.2.0;
+				version = "171.2.0-1";
 			};
 		};
 		9F8FE9472BAE50E50071E372 /* XCRemoteSwiftPackageReference "lottie-spm" */ = {

DuckDuckGo.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -32,8 +32,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/DuckDuckGo/BrowserServicesKit",
       "state" : {
-        "revision" : "a3bd039e78e75e0ad36dffbf1874b555738f22af",
-        "version" : "171.2.0"
+        "revision" : "8adaa843affde9167bd2a987eed6b73f54524232",
+        "version" : "171.2.0-1"
       }
     },
     {

DuckDuckGo/AppDelegate.swift

@@ -106,12 +106,6 @@ import WebKit
 
     override init() {
         super.init()
-
-        if !didCrashDuringCrashHandlersSetUp {
-            didCrashDuringCrashHandlersSetUp = true
-            CrashLogMessageExtractor.setUp()
-            didCrashDuringCrashHandlersSetUp = false
-        }
     }
 
     // swiftlint:disable:next function_body_length