Use ping to improve network test

[wolfogre]

The ping command works well with mDNS, while the host command does not.

To avoid failed tests like:

2024-03-28T07:30:14.5399002Z [test network setup/test] [DEBUG] Working directory '/home/runner/work/act/act/pkg/runner/testdata'
2024-03-28T07:30:14.5399461Z [test network setup/test]   | fv-az1040-512.0dilqmdz4mhurinb4xzj4l1lvc.bx.internal.cloudapp.net
2024-03-28T07:30:14.5400024Z [test network setup/test]   | fv-az1040-512.0dilqmdz4mhurinb4xzj4l1lvc.bx.internal.cloudapp.net has address 10.1.0.90
2024-03-28T07:30:14.5400617Z [test network setup/test]   | Host fv-az1040-512.0dilqmdz4mhurinb4xzj4l1lvc.bx.internal.cloudapp.net not found: 3(NXDOMAIN)
2024-03-28T07:30:14.5400892Z [test network setup/test]   ❌  Failure - Main Run hostname test
2024-03-28T07:30:14.5401089Z [test network setup/test] exitcode '1': failure
2024-03-28T07:30:14.5401260Z [test network setup/test] 🏁  Job failed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.20%. Comparing base (5a80a04) to head (a1392f1).
Report is 27 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2266      +/-   ##
==========================================
+ Coverage   61.56%   62.20%   +0.64%     
==========================================
  Files          53       56       +3     
  Lines        9002     9139     +137     
==========================================
+ Hits         5542     5685     +143     
+ Misses       3020     3006      -14     
- Partials      440      448       +8     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[ChristopherHX]

Thanks, let's see how much better it will be