Fix "Open support case" in masthead

[fhlavac]

Part of RHCLOUD-28362

Added a fallback adding app_name from the url if the current product name and hash are not retrieved because of missing app.info.json file

[fhlavac]

/retest

[codecov-commenter]

Codecov Report

Merging #2649 (332773c) into master (d5e0cd6) will decrease coverage by 0.03%.
The diff coverage is 0.00%.

❗ Current head 332773c differs from pull request most recent head 72d367c. Consider uploading reports for the commit 72d367c to get more accurate results

@@            Coverage Diff             @@
##           master    #2649      +/-   ##
==========================================
- Coverage   57.49%   57.47%   -0.03%     
==========================================
  Files          93       93              
  Lines        2842     2843       +1     
  Branches      661      582      -79     
==========================================
  Hits         1634     1634              
- Misses       1133     1208      +75     
+ Partials       75        1      -74     

Files	Coverage Δ
src/utils/createCase.ts	17.24% <0.00%> (-0.31%)	⬇️

... and 24 files with indirect coverage changes