[Popover] default enforceFocus to false to prevent issue with neste…

…d popovers (#21012)

## Summary & Motivation

Fixes:
https://linear.app/dagster-labs/issue/FE-252/daggy-u-dialog-blocks-input-in-textboxes-during-serverless-nux

Nested blueprint popovers are buggy, blueprint recommends setting
`enforceFocus=false` on the outermost popover in this case. We're going
to set enforceFocus=false as the default instead of on a case by case
basis to prevent further instances of the bug and because there hasn't
been any case where we intentionally wanted to enforce focus.

## How I Tested These Changes

With storybook

js_modules/dagster-ui/packages/ui-components/src/components/Popover.tsx

@@ -106,6 +106,7 @@ export const Popover = (props: Props) => {
     <Popover2
       minimal
       autoFocus={false}
+      enforceFocus={false}
       {...props}
       popoverClassName={`dagster-popover ${props.popoverClassName}`}
       modifiers={deepmerge(