Only log progress in make() and r_make()

[wlandau]

Prework

• Read and abide by drake's code of conduct.
• Search for duplicates among the existing issues, both open and closed.

Description

This affects the log_progress and console_log_file arguments.

[wlandau]

Should change the default value of log_progress to TRUE in drake_config().

[wlandau]

Reason for this issue: ensure r_make() logs progress and r_vis_drake_graph() does not break the log.

[wlandau]

On second thought: let's continue to allow other functions to write to the console log file as long as we clearly indicate the function that is running and add a line break between function calls where appropriate.

[wlandau]

Never mind the line breaks, that gets too messy. Let's add the PID to the log instead.