add option to limit amount of log files to collect

[michaelsembwever]

Currently all log files are collected.

ref: https://github.com/datastax/diagnostic-collection/blob/master/ds-collector/rust-commands/collect-info.rs#L765-L774

Some cluster/nodes can have many GBs of logs that make running montecristo difficultly painful; logs that are over time periods that offer little value.

The idea here is to implement an option that can be passed into collect-info and then onto cpReadable.sh for find arguments, something like cpReadable_args.
For limiting the logs collected we could then cpReadable_args: -mtime -7

[michaelsembwever]

#188