feat(googlecloudk8scommon): default kind filter to all kinds except leases

[kyasbal]

Summary

Updates the Kubernetes resource kind filter default value and alias in InputKindFilterTask:

• Updates the default filter value from @default to []string{"@any", "-leases"}.
• Replaces the @default alias with @legacy_default to prevent semantic drift, maintaining the curated list of legacy kinds under an explicit retrospective name and avoiding hyphen confusion with the subtractive filter -.
• Introduces comprehensive unit tests in inputkindfilter_task_test.go covering metadata, default values, subtractive filtering, alias expansion, custom inputs, and validation errors.
• Updates the audit log benchmark fixture config in parser_test.go to use @legacy_default.

Test Plan

• Run make lint-go (passed with 0 issues).
• Run go test -v ./pkg/task/inspection/googlecloudk8scommon/impl/... ./pkg/task/inspection/googlecloudlogk8saudit/impl/... (passed).
• Run make test-go (all backend test suites passed).
• Run make pre-commit (all linters and formatters passed).

[gemini-code-assist]

Code Review

This pull request updates the InputKindFilterTask to change its default value from @default to ["@any", "-leases"] and renames the @default alias to @legacy_default. It also adds comprehensive unit tests for the InputKindFilterTask and updates existing test configurations to use the new @legacy_default alias. There are no review comments, so I have no feedback to provide.