misc: Remove 'run-name' from workflow yaml files

This field is not necessary and was not a helpful description of the
run.

Change-Id: I078481920833fb36099e6c30295c0b60ac0ee3a0
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/71505
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>

.github/workflows/ci-tests.yaml

@@ -1,7 +1,6 @@
 # This workflow runs after a pull-request has been approved by a reviewer.
 
 name: CI Tests
-run-name: ${{ github.actor }} is running the pull-request continuous integration tests
 
 on:
   pull_request:

.github/workflows/daily-tests.yaml

@@ -1,8 +1,6 @@
 # This workflow runs all of the long tests within main.py, extra tests in nightly.sh, and unittests
 
 name: Daily Tests
-run-name: ${{ github.actor }} is running the daily tests
-
 
 on:
   # Runs every day from 7AM UTC

.github/workflows/weekly-tests.yaml

@@ -1,8 +1,6 @@
 # This workflow runs all of the very-long tests within main.py
 
 name: Weekly Tests
-run-name: ${{ github.actor }} is running the weekly tests
-
 
 on:
   # Runs every Sunday from 7AM UTC