fix(button): fixed target area size for all button sizes (#31007)

Issue number: resolves #

---------

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## What is the current behavior?
Now target area `min-height` for Ionic theme is set to the default size
token size, which causes an issue when button size is **small**.

## What is the new behavior?
By changing this to **inherit** target area will have now the parent
height.


## Does this introduce a breaking change?

- [ ] Yes
- [X] No

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## Other information

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core/src/components/button/button.ionic.scss

@@ -19,7 +19,7 @@
     position: absolute;
 
     height: 100%;
-    min-height: globals.$ion-scale-1200;
+    min-height: inherit;
 
     transform: translateY(-50%);