test: Increase code coverage in CryptoDeleteHandlerTest

[petreze]

Description:
Code coverage increased from 77.78 % to 94.44 %

Related issue(s):

Fixes #16831

Notes for reviewer:

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.01% (target: -1.00%)	✅ ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (539f059)	97548	63701	65.30%
Head commit (966a5b1)	97548 (+0)	63707 (+6)	65.31% (+0.01%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#16832)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.60%. Comparing base (539f059) to head (966a5b1).
Report is 2 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop   #16832   +/-   ##
==========================================
  Coverage      63.60%   63.60%           
- Complexity     20401    20402    +1     
==========================================
  Files           2537     2537           
  Lines          94783    94783           
  Branches        9907     9907           
==========================================
+ Hits           60285    60291    +6     
+ Misses         30892    30886    -6     
  Partials        3606     3606           

see 1 file with indirect coverage changes

[thomas-swirlds-labs]

Lgtm, thanks! @petreze