bug(FORM-FIELD): Container shape is incorrectly applied for both outlined and filled.

### Is this a regression?

- [ ] Yes, this behavior used to work in the previous version

### The previous version in which this bug was not present was

_No response_

### Description

- Filled container shape only applies to the top half of the container.
- Outline container shape incorrectly uses the shape dimensions as the padding causing very wide fields.

### Reproduction

StackBlitz link: https://stackblitz.com/edit/components-issue-starter-sd5v83bx?file=package.json
Steps to reproduce:
1. Override form-field-overrides with "filled-container-shape: var(--mat-sys-corner-full),"
2. Override form-field-overrides with "outlined-container-shape: var(--mat-sys-corner-full),"

### Expected Behavior

The form-fields should be a rectangular with fully rounded corners.

### Actual Behavior

Filled form-fields are only rounding the top half.
Outlined form-fields are become 18000px wide

### Environment

- Angular: 19.2.6
- CDK/Material: 19.2.9
- Browser(s): Chrome
- Operating System (e.g. Windows, macOS, Ubuntu): Mac

Beginnen Sie mit der bereitgestellten StackBlitz-Reproduktion und den Einstellungen für form-field-overrides für gefüllte und umrandete Felder. Überprüfen Sie das Verhalten bei den angegebenen Angular- und Material-Versionen und bestätigen Sie anschließend, dass beide Varianten vollständig abgerundete rechteckige Ecken haben, ohne dass das umrandete Feld übermäßig breit wird.

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