mcp: change DeleteInput.All from *string to *bool

[Elvand-Lie]

The All field in DeleteInput was typed as *string but the underlying func delete --all CLI flag is boolean. This caused the JSON schema to present a string field to MCP clients instead of a boolean, and passed the flag as --all true (two separate args) instead of --all.

Change All to *bool and use appendBoolFlag instead of appendStringFlag.

Changes

• Change DeleteInput.All from *string to *bool
• Switch from appendStringFlag to appendBoolFlag for the --all flag

Fixes #3706

Release Note

Docs

[knative-prow]

Hi @Elvand-Lie. Thanks for your PR.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.90%. Comparing base (2b6fb02) to head (eda7327).
⚠️ Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3710      +/-   ##
==========================================
- Coverage   56.91%   56.90%   -0.01%     
==========================================
  Files         181      181              
  Lines       20928    20928              
==========================================
- Hits        11912    11910       -2     
- Misses       7808     7810       +2     
  Partials     1208     1208              

Flag	Coverage Δ
e2e	36.15% <0.00%> (-0.01%)	⬇️
e2e go	32.75% <0.00%> (ø)
e2e node	28.48% <0.00%> (ø)
e2e python	33.11% <0.00%> (-0.01%)	⬇️
e2e quarkus	28.62% <0.00%> (ø)
e2e rust	28.03% <0.00%> (ø)
e2e springboot	?
e2e typescript	28.61% <0.00%> (+0.02%)	⬆️
e2e-config-ci	17.88% <0.00%> (ø)
integration	17.44% <0.00%> (+<0.01%)	⬆️
unit macos-14	44.99% <100.00%> (ø)
unit macos-latest	44.99% <100.00%> (ø)
unit ubuntu-24.04-arm	45.16% <100.00%> (ø)
unit ubuntu-latest	45.84% <100.00%> (ø)
unit windows-latest	44.97% <100.00%> (ø)

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[gauron99]

/ok-to-test
/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Elvand-Lie, gauron99

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