fix(menu): remove app dir from safe area padding (#28123)

Issue number: internal

---------

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## What is the current behavior?
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The `--ion-safe-area-left` and `--ion-safe-area-right` variables in
`ion-menu` are being set as if they use the app's direction. It's been
determined that safe area is not logical and uses the device's
direction. The current implementation is adding padding in the wrong
sides for `ion-toolbar` and `ion-content` within a `ion-menu`.

Additionally, `ion-menu` does not use the entire screen so the safe area
only needs to be applied to the side that is touching the device screen.

## What is the new behavior?
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this PR. -->

- Set the `--ion-safe-area-left` and `--ion-safe-area-right` variables
to the correct values based on the device's direction.
- Padding is only added to the side that is not in the safe area.
- `ion-toolbar` is adding `--ion-safe-area-left` and
`--ion-safe-area-right` based on the device's direction.
- `ion-toolbar` can now inherit the correct values from
`--ion-safe-area-left` and `--ion-safe-area-right`.
- `ion-content` can now inherit the correct values from
`--ion-safe-area-left` and `--ion-safe-area-right`.

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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and migration path for existing applications below. -->


## Other information

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screenshots of how the component looks before and after the change. -->

Dev build: 7.3.4-dev.11694015543.18bc484f

core/src/components/toolbar/toolbar.scss

@@ -28,7 +28,6 @@
   --opacity-scale: 1;
 
   @include font-smoothing();
-  @include padding-horizontal(var(--ion-safe-area-left), var(--ion-safe-area-right));
 
   display: block;
 
@@ -36,6 +35,11 @@
 
   width: 100%;
 
+  // stylelint-disable-next-line property-disallowed-list
+  padding-right: var(--ion-safe-area-right);
+  // stylelint-disable-next-line property-disallowed-list
+  padding-left: var(--ion-safe-area-left);
+
   color: var(--color);
 
   font-family: $font-family-base;