Make bucket force_destroy configurable

[MarcosAsh]

Adds --force-destroy/--no-force-destroy (env: KINETIC_FORCE_DESTROY) to kinetic up. The setting is persisted via pulumi.export and read back by load_state, so pool add/remove preserve it instead of silently reverting. Default stays force_destroy=True.

#23 bundles 5 separate config requests. This PR addresses the first (force_destroy on pulumi resources). The other 4 (multi-GPU node pools, pulumi state backend, stateful CLI configs, CLI config updates) are out of scope for this PR.

[gemini-code-assist]

Code Review

This pull request introduces a force_destroy configuration for GCS buckets, allowing users to control whether buckets are automatically emptied during teardown. It adds a --force-destroy/--no-force-destroy CLI option to the up command, implements state persistence for this setting, and ensures it is correctly propagated to the underlying Pulumi infrastructure. The implementation follows the repository's precedence rules (CLI flag > existing state > default) and includes comprehensive unit tests. I have no feedback to provide as there were no review comments to evaluate.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 95.83333% with 4 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@8a85c3c). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
kinetic/cli/infra/stack_manager.py	20.00%	4 Missing ⚠️

Additional details and impacted files

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  Hits            ?     9269           
  Misses          ?      966           
  Partials        ?        0           

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