[Copilot]

Consumers may need to avoid Jackson 2 in their dependency tree while retaining the existing serialization behavior. Keep the Jackson 2 serializer as the default and allow consumers to provide a per-ObjectMapper alternative without changing existing interfaces.

• Default: Preserve the existing Jackson 2 serialization for IntOrString.
• Customization: Use a Jackson mix-in to select a custom serializer:

  @JsonSerialize(using = MyIntOrStringSerializer.class)
  abstract class IntOrStringMixin {}
  
  mapper.addMixIn(IntOrString.class, IntOrStringMixin.class);

• Dependency: Mark jackson-databind optional so consumers can manage their own Jackson dependencies.

• Fixes Migrate to Jackson 3 #4932

[linux-foundation-easycla]

• ✅ login: brendandburns / name: Brendan Burns (38b43d8, 5351a02)
• ❌ - login: @copilot / name: copilot-swe-agent[bot]. The commit (38b43d8, 3d511be, 5351a02) is not authorized under a signed CLA. Please click here to be authorized. For further assistance with EasyCLA, please visit our EasyCLA portal and chat with our support bot.

[kubernetes-prow]

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