fix(rustfs): remove backup capability from runtime baseline

[weicao]

Problem

The first DP-removal candidate was based on the older product head and dropped the validated runtime baseline's roleProbe.periodSeconds: 1 and timeoutSeconds: 3. A live addon upgrade then failed closed because those ComponentDefinition fields are immutable.

Change

• start from exact runtime combined baseline bbc7da4602fdcb1db55e0f423e1dd75f9e9f8605
• remove only RustFS generic BackupPolicyTemplate, ActionSet, backup/restore scripts, and backup-only values/helper
• preserve roleProbe timing 1s/3s
• extend the negative capability contract to lock both DP absence and roleProbe timing

Evidence

• RED on prior candidate 5a9a67546fe8d8b121ffb18e76c3ce2ff3b67248: contract rc1, missing periodSeconds: 1
• GREEN on 956dc71742cefae1f84b893201b4431c7c5d2aae
• Bash 5 ShellSpec 54/0; Bash 3 ShellSpec 7/0
• Helm lint/render, bash-n, ShellCheck error, diff-check PASS
• baseline render with only BPT/ActionSet documents filtered out is byte-identical to successor render
• successor render contains roleProbe periodSeconds: 1 and timeoutSeconds: 3

Boundary

Source/offline successor only. The Test owner must independently freeze, live-upgrade, run clean-full, seal evidence, and clean normally before any runtime/formal-N claim.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 50 lines in your changes missing coverage. Please review.
✅ Project coverage is 0.00%. Comparing base (bbc7da4) to head (956dc71).

Files with missing lines	Patch %	Lines
...scripts-ut-spec/no_dataprotection_contract_test.sh	0.00%	43 Missing ⚠️
...scripts-ut-spec/no_dataprotection_contract_spec.sh	0.00%	7 Missing ⚠️

Additional details and impacted files

@@                            Coverage Diff                             @@
##           jessica/rustfs-backup-roleprobe-candidate   #3271    +/-   ##
==========================================================================
  Coverage                                       0.00%   0.00%            
==========================================================================
  Files                                            162     162            
  Lines                                          24962   24748   -214     
==========================================================================
+ Misses                                         24962   24748   -214     

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