Fix the plot_tcmpr.R script to support specifying a directory with -lookin.

[georgemccabe]

Describe the Problem

The script calls tc_stat with the -lookin argument. There is an ls command in the script that is used to expand wildcards. However, this fails to expand to the correct path if a directory is provided. On some machines like Hera, the ls command will fail if a large list of files is provided, so the directory must be provided instead of each individual file to run properly.

Expected Behavior

Passing a directory to the script with the -lookin arugment should work properly.

Environment

Describe your runtime environment:
1. Machine: (e.g. HPC name, Linux Workstation, Mac Laptop)
2. OS: (e.g. RedHat Linux, MacOS)
3. Software version number(s)

To Reproduce

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https://dtcenter.org/community-code/model-evaluation-tools-met/met-help-desk#ftp

Relevant Deadlines

10.0.1 bugfix and 10.1.0 beta 2

Funding Source

2788881

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Define Related Issue(s)

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• Add option to TCMPRPlotter to pass in directory to tc_stat instead of individual files METplus#1057 is also needed

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