docs(guide/Internet Explorer Compatibility): include warnings for usage of 'disabled' attribute

* docs(guide/Internet Explorer Compatibility): Mention 'disabled' attribute

Setting the 'disabled' attribute on an element that has descendant elements has unexpected behavior in Internet Explorer 11.

* Input elements that are descendants have the text content of the 'placeholder' attribute inserted as the value (and it is not removed when typing in the field).
* Select elements that are descendants are disabled.

To avoid this issue, it is important to not set `disabled` or `ng-disabled` on an element that has descendant form elements. Normally these should only be used on actual form controls so the issue would not manifest.

The issue can also appear if a directive/component is named 'disabled' or takes an attribute named 'disabled' as an input/output attribute, so avoid these.

Closes  #16490
Related #15700