[REST API] Replaced the old "/test" rest api endpoint with a "dryRun" query param

[EricWittmann]

This is available when creating artifacts and when creating versions. Essentially this will run the rules and then return a dummy success response if everything was OK (instead of actually creating anything).

[github-actions]

Qodana Community for JVM

13 new problems were found

Inspection name	Severity	Problems
Use of obsolete date-time API	🔶 Warning	3
Auto-unboxing	🔶 Warning	2
Object allocation in loop	🔶 Warning	2
Overly complex class	🔶 Warning	1
Statement lambda can be replaced with expression lambda	🔶 Warning	1
Overly complex method	🔶 Warning	1
Class with too many methods	🔶 Warning	1
Overly long method	🔶 Warning	1
Method with more than three negations	🔶 Warning	1

💡 Qodana analysis was run in the pull request mode: only the changed files were checked
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