CLI-1415: [auth:acsf-login] validate factory URL

[danepowell]

Motivation

Fixes CLI-1415

Proposed changes

Alternatives considered

Testing steps

1. Follow the contribution guide to set up your development environment or download a pre-built acli.phar for this PR.
2. Clear the kernel cache to pick up new and changed commands: ./bin/acli ckc
3. (add specific steps for this pr)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.64%. Comparing base (b12cc94) to head (2ffbe3a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1827      +/-   ##
============================================
+ Coverage     92.56%   92.64%   +0.08%     
- Complexity     1831     1833       +2     
============================================
  Files           123      123              
  Lines          6937     6946       +9     
============================================
+ Hits           6421     6435      +14     
+ Misses          516      511       -5     

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[github-actions]

Try the dev build for this PR: https://acquia-cli.s3.amazonaws.com/build/pr/1827/acli.phar

curl -OL https://acquia-cli.s3.amazonaws.com/build/pr/1827/acli.phar
chmod +x acli.phar