Include field modifiers in collision avoidance

[kubukoz]

In #1301, we forgot to apply collision avoidance on field modifiers (which include the TypedNode for the field's default value). This would result in incorrectly rendering an unchanged type name in default values, which could result in e.g. a Scala keyword, or a lowercase reference to a shape that gets rendered as uppercase (as reported in #1592).

Closes #1592

PR Checklist (not all items are relevant to all PRs)

• Added unit-tests (for runtime code)
• Added bootstrapped code + smoke tests (when the rendering logic is modified)
• Added build-plugins integration tests (when reflection loading is required at codegen-time)
• Added alloy compliance tests (when simpleRestJson protocol behaviour is expanded/updated)
• Updated dynamic module to match generated-code behaviour
• Added documentation
• Updated changelog