[wpiutil] Add DataLog and DataLogManager Stop() (#5860)

Restarting a stopped log results in creating a new log file with fresh copies of the same start records and schema data records.

Also check to see if the file has been deleted or if the log file exceeds 1.8 GB, and start a new one.

ntcoreffi/src/main/native/include/DataLogManager.h

@@ -52,6 +52,11 @@ class DataLogManager final {
   static void Start(std::string_view dir = "", std::string_view filename = "",
                     double period = 0.25);
 
+  /**
+   * Stop data log manager.
+   */
+  static void Stop();
+
   /**
    * Log a message to the "messages" entry. The message is also printed to
    * standard output (followed by a newline).
@@ -110,6 +115,11 @@ struct WPI_DataLog;
  */
 void DLM_Start(const char* dir, const char* filename, double period);
 
+/**
+ * Stop data log manager.
+ */
+void DLM_Stop(void);
+
 /**
  * Log a message to the "messages" entry. The message is also printed to
  * standard output (followed by a newline).