[DateInputs] Setting the size and fillMode properties to a string value throws an error

[yanmariomenev]

Describe the bug
The bug is present in the DateTimePicker, DatePicker, and TimePicker components.
When setting the size property to a string like size="small" a TypeScrip error is thrown:

This is also valid for fillMode property.

To Reproduce
Steps to reproduce the behavior:
size - https://stackblitz.com/edit/angular-balrnj-yggdax?file=src%2Fapp%2Fconfigurator.component.ts,src%2Fapp%2Fapp.component.ts

fillMode - https://stackblitz.com/edit/angular-9s2ehv-fgybbb?file=src%2Fapp%2Fapp.component.ts

Workaround
https://stackblitz.com/edit/angular-balrnj-kuwblx?file=src%2Fapp%2Fconfigurator.component.ts,src%2Fapp%2Fapp.component.ts

[ZenSide]

I confirm this issue is still present in datepicker and timepicker components in version 7.1.2.
It's still not possible to set a size for those components via a string attribute. size="small". It's working via angular binding [size]="'small'"

[aldrashan]

Still broken in version 13.1.0.