refactor for tautological condition non-nil not equal to nil

[sejima1105]

Description

Refactoring for tautological condition non-nil != nil

Checklist

Please check if applicable

• [x] Tests have been added (if applicable, ie. when operator codes are added or modified)
• [x] Relevant docs have been added or modified (if applicable, ie. when new features are added or current features are modified)

Relevant issue https://github.com/st-tech/sre-dept-issues/issues/7361

Operation check

I ran the sample scenario and confirmed that no errors occurred.