Replace test set-style map[string]bool usage with map[string]struct{}

[Copilot]

Daily linting flagged widespread test-only set patterns implemented as map[string]bool, which are non-idiomatic and allocate unnecessary values. This change converts the flagged set usages to map[string]struct{} and updates related write/read patterns without changing test intent.

• Scope: test set patterns

  • Converted flagged set-style declarations in tests from map[string]bool to map[string]struct{}.
  • Updated set writes from m[k] = true to m[k] = struct{}{}.

• Membership checks and assertions

  • Reworked membership checks to existence semantics (_, ok := m[k]) where direct boolean reads were used.
  • Updated assertion patterns accordingly (for example, to assert.Contains / assert.NotContains for set membership checks).

• Compatibility where APIs still require map[string]bool

  • Added a small converter helper in pkg/cli/engine_secrets.go (stringSetToBoolMap) and used it in affected tests that pass set data into bool-map APIs, keeping production behavior unchanged while allowing idiomatic set representation in test setup.

// before
values := make(map[string]bool)
values[o.Value] = true
assert.True(t, values["daily"])

// after
values := make(map[string]struct{})
values[o.Value] = struct{}{}
assert.Contains(t, values, "daily")