[Refactor] Consolidate Bootstrap Generation Logic

[astrogilda]

Is your feature request related to a problem? Please describe.
There are 15+ duplicate implementations of _generate_samples_single_bootstrap across different bootstrap modules, leading to code duplication and maintenance challenges.

Describe the solution you'd like
Implement a unified approach using either:

1. Template Method Pattern: Create an abstract base method with customizable hooks
2. Strategy Pattern: Use composition to inject specific bootstrap generation strategies

The solution should:

• Extract common bootstrap generation logic into the base class
• Allow subclasses to customize specific steps without duplicating the entire method
• Maintain backward compatibility with existing API

Describe alternatives you've considered

• Mixin classes for shared functionality
• Function composition with decorators
• Utility module with shared functions

Additional context
Benefits of consolidation:

• DRY (Don't Repeat Yourself) principle compliance
• Easier maintenance and bug fixes
• Consistent behavior across all bootstrap types
• Reduced testing burden

Part of codebase quality improvement initiative identified in refactoring analysis.