test: adds negative scenario outline for jwt credential offer

[amagyar-iohk]

Description:

Adds negative scenario outline for jwt credential offer

Checklist:

• My PR follows the contribution guidelines of this project
• My PR is free of third-party dependencies that don't comply with the Allowlist
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked the PR title to follow the conventional commit specification

[github-actions]

Integration Test Results

20 files  ±0  20 suites  ±0   3s ⏱️ ±0s
57 tests +1  57 ✅ +1  0 💤 ±0  0 ❌ ±0 
99 runs  +1  99 ✅ +1  0 💤 ±0  0 ❌ ±0 

Results for commit 389fba4. ± Comparison against base commit 8781d3d.

♻️ This comment has been updated with latest results.

[github-actions]

Unit Test Results

104 files  ±0  104 suites  ±0   20m 47s ⏱️ -7s
882 tests ±0  874 ✅ ±0  8 💤 ±0  0 ❌ ±0 
889 runs  ±0  881 ✅ ±0  8 💤 ±0  0 ❌ ±0 

Results for commit 389fba4. ± Comparison against base commit 8781d3d.

♻️ This comment has been updated with latest results.

[coveralls]

coverage: 48.854%. remained the same
when pulling 389fba4 on test/jwt-offer
into 8781d3d on main.