php 8.3: fix catch for empty sitemap filename

[midlan]

Description (*)

With PHP 7.4 this catch will catch empty filename exception. With PHP 8.3, empty filename escapes the catch, because it is type of ValueError which does not inherit from Exception. This PR fixes the catch, that PHP 8.3 behavior is the same as PHP 7.4

full PHP 8.3 error that escapes the catch

PHP Fatal error:  Uncaught ValueError: Path cannot be empty in /srv/www/scooterdiscounter/public/lib/Varien/Io/File.php:139

Manual testing scenarios (*)

1. create sitemap with empty filename (using script or manipulate in database)
2. execute cronjob sitemap_generate

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All automated tests passed successfully (all builds are green)

[github-actions]

Test Results

541 tests  ±0   533 ✅ ±0   2s ⏱️ ±0s
145 suites ±0     8 💤 ±0 
  1 files   ±0     0 ❌ ±0 

Results for commit b03990f. ± Comparison against base commit 4dc680e.

[github-actions]

Test Results

541 tests  ±0   533 ✅ ±0   2s ⏱️ ±0s
145 suites ±0     8 💤 ±0 
  1 files   ±0     0 ❌ ±0 

Results for commit b03990f. ± Comparison against base commit 4dc680e.

[github-actions]

Test Results

541 tests  ±0   533 ✅ ±0   2s ⏱️ ±0s
145 suites ±0     8 💤 ±0 
  1 files   ±0     0 ❌ ±0 

Results for commit b03990f. ± Comparison against base commit 4dc680e.

♻️ This comment has been updated with latest results.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud