fix(select-modal): match radio styles to iOS native (#30119)

Issue number: internal

---------

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## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->

When the `select-modal` displays radios, a bottom border is shown under
the radio icon and text. However, native iOS does not have the border
under the icon.

## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

- The bottom border is displayed under the radio text only.
- The `ion-item` within `select-modal` has been given the prop of
`lines="none"` since border styling has been done through
`select-md.ios.scss` and because `md` doesn't use it.
- Updated snapshots

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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## Other information

<!-- Any other information that is important to this PR such as
screenshots of how the component looks before and after the change. -->

[Preview
(iOS)](https://ionic-framework-git-rou-11404-ionic1.vercel.app/src/components/select/test/basic?ionic%3Amode=ios)
[Preview
(md)](https://ionic-framework-git-rou-11404-ionic1.vercel.app/src/components/select/test/basic)

core/src/components/select-modal/select-modal.ios.scss

@@ -1 +1,24 @@
 @import "./select-modal";
+@import "../item/item.ios.vars";
+@import "../radio/radio.ios.vars";
+
+ion-item {
+  --inner-padding-end: 0;
+}
+
+/**
+ * The bottom border of the item should only be displayed
+ * under the text and not the radio icon.
+ */
+ion-radio::after {
+  @include position(null, null, 0, calc($radio-ios-icon-width + $item-ios-padding-start));
+  position: absolute;
+
+  width: calc(100% - $radio-ios-icon-width - $item-ios-padding-start); /* Adjust width based on the shift */
+
+  border-width: #{0px 0px $item-ios-border-bottom-width 0px};
+  border-style: #{$item-ios-border-bottom-style};
+  border-color: #{$item-ios-border-bottom-color};
+
+  content: "";
+}

core/src/components/select-modal/select-modal.tsx

@@ -81,6 +81,7 @@ export class SelectModal implements ComponentInterface {
       <ion-radio-group value={checked} onIonChange={(ev) => this.callOptionHandler(ev)}>
         {this.options.map((option) => (
           <ion-item
+            lines="none"
             class={{
               // TODO FW-4784
               'item-radio-checked': option.value === checked,