fix(react): reduce polymorphic as type instantiations

[Anber]

Summary

• defer JSX.IntrinsicElements[TAs] expansion until as resolves to a concrete intrinsic tag
• prevent target props from widening TAs
• preserve intrinsic prop inference for usages such as as="a"
• add negative tests for props that do not belong to the selected tag

Why

@linaria/react@8.1.0 made every styled component expose a generic overload indexed by the full JSX.IntrinsicElements map. In styled-heavy React 19 projects, TypeScript can materialize that map for every component, causing millions of type instantiations and out-of-memory failures.

The new helper avoids expanding the map while TAs is still unresolved. Once as is a concrete intrinsic tag, its corresponding props are selected normally.

Fixes #1489.

Validation

• pnpm check:all

[changeset-bot]

🦋 Changeset detected

Latest commit: 76517ff

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 9 packages

Name	Type
@linaria/react	Patch
@linaria/atomic	Patch
@linaria/babel-plugin-interop	Patch
@linaria/core	Patch
@linaria/postcss-linaria	Patch
@linaria/server	Patch
@linaria/stylelint	Patch
@linaria/stylelint-config-standard-linaria	Patch
linaria	Patch

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