[Logs API/SDK] Drop include_trace_context parameter from LoggerProvider::GetLogger()

[lalitb]

As per the specs changes - open-telemetry/opentelemetry-specification#3397, the include_trace_context argument should be removed from LoggerProvider::GetLogger() method. The logger should use trace flags if explicitly set through LogRecord::SetTraceFlags(), else it should implicitly extract them from current Context inside Logger::EmitLogRecord method.