Lifetime validation: Remove exceptions

[iNinja]

Lifetime validation: Remove exceptions

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Removed exceptions thrown as part of lifetime validation.

Description

• Implemented new (internal momentarily) method for lifetime validation which replaces exception throwing with a return of the new LifetimeValidationResult containing the exception information.
• Added new delegate signature for lifetime validation
• Added tests around all the previous cases.
• Updated ambiguous references in documentation to specify the old version of ValidateLifetime.