feat: add form attribute for ion-button

[Spinnenzunge]

Prequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already include this feature request, without success.

Describe the Feature Request

Add the html 5 form attribute (https://developer.mozilla.org/en-US/docs/Web/HTML/Element/button#attr-form) for buttons on the ion-button component

Describe the Use Case

This lets the button element inside ion-button associate with a form element in the dom. Especially useful if the ion-button type="submit" can not be placed inside a form element, e.g. if we want to place it inside the ion-footer container but the form is inside ion-content

Describe Preferred Solution

Just pass the form attribute (and maybe other form specific attributes specified in https://developer.mozilla.org/en-US/docs/Web/HTML/Element/button) to its native button element inside the shadow dom

Describe Alternatives

No response

Related Code

No response

Additional Information

No response

[liamdebeasi]

Thanks for the issue. I am going to close this as a duplicate of #21194.

[Spinnenzunge]

Oh my bad, sorry

[ionitron-bot]

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