feat(apple): ClearAttachments on Scope (#3797)

Author: philipphofmann

src/includes/enriching-events/attachment-upload/apple.mdx

@@ -12,6 +12,11 @@ SentrySDK.configureScope { scope in
 SentrySDK.captureMessage(message: "my message", block: { scope in
 	scope.addAttachment(fileAttachment)
 })
+
+// Clear all attachments in the global Scope
+SentrySDK.configureScope { scope in
+	scope.clearAttachments()
+}
 ```
 
 ```objc {tabTitle:Objective-C}
@@ -30,4 +35,8 @@ SentryAttachment *fileAttachment =
     [scope addAttachment:fileAttachment];
 }];
 
+// Clear all attachments in the global Scope
+[SentrySDK configureScope:^(SentryScope *_Nonnull scope) {
+    [scope clearAttachments];
+}];
 ```