Fix broken regex alternation in detections

[srkyn]

Summary

• Restores regex alternation that was split across SPL pipeline lines
• Updates affected analytic metadata versions and modification dates
• Covers the six detections called out in [BUG] Broken REGEX for several detections #4077

Validation

• YAML parsed successfully for all touched detections
• Regex sanity check compiled match() patterns from the touched searches
• git diff --check passed

Fixes #4077