[LLDB][Telemetry]Define DebuggerTelemetryInfo and related methods (#127696)
This type of entry is used to collect data about the debugger
startup/exit
Also introduced a helper ScopedDispatcher
---------
Co-authored-by: Jonas Devlieghere <jonas@devlieghere.com>
Co-authored-by: Pavel Labath <pavel@labath.sk>