IGNITE-22998 Fix ValidateIndexesTaskResult initialization

[superminkfan]

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[yurinaryshkin]

Looks good.

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud