Phase out egrep since it triggers warnings on grep version >= 3.8

[hbrown-uiowa]

Affected Puppet, Ruby, OS and module versions/distributions

• Puppet: all
• Ruby: all
• Distribution: any distro with grep >= 3.8 (Fedora 38 in particular)
• Module version: all

How to reproduce (e.g Puppet code you use)

Run the script /opt/puppetlabs/pe_patch/pe_patch_fact_generation.sh on a distro with grep >= 3.8

What are you seeing

egrep: warning: egrep is obsolescent; using grep -E
egrep: warning: egrep is obsolescent; using grep -E

What behaviour did you expect instead

No output

Output log

Any additional information you'd like to impart

Since we have the script running in a cron job, we do get multiple emails per day per system. It adds up.