fix(inputs): remove invalid legacy warnings in input, textarea, and select

[brandyscarney]

Issue number: N/A

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What is the current behavior?

When using an ion-label as a label slot inside of an ion-input, ion-textarea or ion-select it erroneously flags the input as a legacy component and ignores the label-placement:

Code	Result
<ion-item> <ion-input label-placement="floating"> <ion-label slot="label"> <ion-icon name="home"></ion-icon> Slotted Label </ion-label> </ion-input> </ion-item> <ion-item> <ion-input label-placement="floating" value="Value"> <ion-label slot="label"> <ion-icon name="person"></ion-icon> Slotted Label </ion-label> </ion-input> </ion-item>

What is the new behavior?

Adds ion-input, ion-textarea, and ion-select as components that can contain a named label slot so it no longer assumes that they are legacy components.

Code	Result
<ion-item> <ion-input label-placement="floating"> <ion-label slot="label"> <ion-icon name="home"></ion-icon> Slotted Label </ion-label> </ion-input> </ion-item> <ion-item> <ion-input label-placement="floating" value="Value"> <ion-label slot="label"> <ion-icon name="person"></ion-icon> Slotted Label </ion-label> </ion-input> </ion-item>

Does this introduce a breaking change?

• Yes
• No

[liamdebeasi]

Fix looks good. I'd change the commit message to say "warning" instead of "error" since we're using console.warn