Make -r argument to 'report' required and improve usage message

[wash-amzn]

Before, the --help message didn't indicate multiple -r arguments could be supplied to report

[ec2-user@ip-10-0-0-129 ~]$ ./aperf report --help
Generate an HTML report based on the data collected

Usage: aperf report [OPTIONS]

Options:
  -r, --run <RUN>    Run data to be visualized. Can be a directory or a tarball
  -n, --name <NAME>  Report name
  -v, --verbose...   Show debug messages. Use -vv for more verbose messages
  -h, --help         Print help
  -V, --version      Print version

and moreover, you didn't even have to specify any. Doing so would get you an empty report (not very useful).

[ec2-user@ip-10-0-0-129 aperf]$ ./target/debug/aperf report -n foo
[2024-04-08T14:54:05Z INFO  aperf_lib::report] Creating APerf report...
[2024-04-08T14:54:05Z INFO  aperf_lib::report] Generating foo.tar.gz

[ec2-user@ip-10-0-0-129 aperf]$ cat foo/data/js/runs.js
runs_raw = []

With this change, the usage message shows the ... and running without any -r arguments results in an error

[ec2-user@ip-10-0-0-129 aperf]$ ./target/debug/aperf report --help
Generate an HTML report based on the data collected

Usage: aperf report [OPTIONS] --run <RUN>...

Options:
  -r, --run <RUN>...  Run data to be visualized. Can be a directory or a tarball
  -n, --name <NAME>   Report name
  -v, --verbose...    Show debug messages. Use -vv for more verbose messages
  -h, --help          Print help
  -V, --version       Print version

[ec2-user@ip-10-0-0-129 aperf]$ ./target/debug/aperf report -n foo
error: the following required arguments were not provided:
  --run <RUN>...

Usage: aperf report --run <RUN>... --name <NAME>

For more information, try '--help'.

[RamaMalladiAWS]

Is the intent here not to test X64 and Ubuntu combination?

[wash-amzn]

I'm testing stuff in my personal account's fork of this, but unfortunately github wants to keep automatically updating this PR. Sorry about that, you'll have to ignore the noise for the moment.