test: add option behavior e2e coverage and smoke checks

[overtrue]

Summary

This PR continues the test hardening effort by adding behavior-level integration coverage for key command options and extending smoke validation to include option semantics.

What Changed

• Added a new integration test module in crates/cli/tests/integration.rs:
  • option_behavior_operations
• Added 6 option behavior tests:
  • test_cp_dry_run_does_not_create_target_object
  • test_mv_dry_run_keeps_source_and_skips_target
  • test_rm_dry_run_does_not_delete_object
  • test_head_bytes_returns_prefix_bytes
  • test_find_count_json_reports_match_count
  • test_share_upload_generates_upload_url_with_expiration
• Extended smoke suite in .github/workflows/integration.yml with 2 fast option-behavior checks:
  • option_behavior_operations::test_cp_dry_run_does_not_create_target_object
  • option_behavior_operations::test_head_bytes_returns_prefix_bytes

Why

The previous round established command/option discoverability contracts (--help) but still lacked runtime verification that options actually change behavior correctly. This PR closes that gap for high-risk and high-frequency options (--dry-run, --bytes, --count, upload URL generation).

Validation

All required checks passed locally:

• cargo fmt --all --check
• cargo clippy --workspace -- -D warnings
• cargo test --workspace
• cargo test --package rustfs-cli --test integration --features integration

Real-backend verification against RustFS latest-compatible endpoint:

• TEST_S3_ENDPOINT=http://localhost:9000
• TEST_S3_ACCESS_KEY=accesskey
• TEST_S3_SECRET_KEY=secretkey
• cargo test --package rustfs-cli --test integration --features integration option_behavior_operations:: -- --test-threads=1
  • result: 6 passed, 0 failed

Smoke sequence replay (same env) with updated list:

• object_operations::test_upload_and_download_small_file
• object_operations::test_move_recursive_prefix_s3_to_s3
• quota_operations::test_bucket_quota_set_info_clear
• option_behavior_operations::test_cp_dry_run_does_not_create_target_object
• option_behavior_operations::test_head_bytes_returns_prefix_bytes

All smoke items passed.

Scope

• No protected files modified
• No schema/config contract changes
• Test and workflow hardening only

[Copilot]

Pull request overview

Adds behavior-level integration tests that verify key CLI options change runtime behavior as intended, and extends the GitHub Actions smoke suite to exercise a couple of these option semantics against RustFS “latest”.

Changes:

• Added option_behavior_operations integration test module covering --dry-run, head --bytes, find --count, and share --upload --expire.
• Implemented 6 new end-to-end option behavior tests that validate results by querying the backend (e.g., ls, JSON outputs).
• Extended .github/workflows/integration.yml smoke test list with 2 fast option-behavior checks.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
crates/cli/tests/integration.rs	Adds new integration test module verifying option semantics for cp/mv/rm/head/find/share.
.github/workflows/integration.yml	Adds two option behavior tests to the RustFS-latest smoke test set.

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