fix(tokens): fix usage on components and review scss architecture (#30368)

Issue number: internal

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

Added improvements on scss architecture, as identified on past
assessment, on multiple components.

Some of these changes resulted in snapshots differences, all reviewed
and expected:

- Button spinner - pics with no visual differences/false-positive.
- Item slider -  difference due to updated typography token.
- Item - difference as is now using correct disabled styles tokens.
- searchbar: 1px difference on horizontal margin - expected - to start
using a more rounded value from a token.
- Tab/tab-button - difference as is now using correct typography token.
- Spinner/loading - this looks like a false positive, saw no visible
differences.
- Textarea - this looks like a false positive, saw no visible
differences.
- Typography - this looks like a false positive, saw no visible
differences.

## Does this introduce a breaking change?

- [x] Yes
- [ ] No

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Co-authored-by: ionitron <hi@ionicframework.com>

Author: BenOsodrac

core/api.txt

@@ -1707,10 +1707,8 @@ ion-progress-bar,prop,shape,"rectangular" | "round" | undefined,undefined,false,
 ion-progress-bar,prop,theme,"ios" | "md" | "ionic",undefined,false,false
 ion-progress-bar,prop,type,"determinate" | "indeterminate",'determinate',false,false
 ion-progress-bar,prop,value,number,0,false,false
-ion-progress-bar,css-prop,--background,ionic
 ion-progress-bar,css-prop,--background,ios
 ion-progress-bar,css-prop,--background,md
-ion-progress-bar,css-prop,--progress-background,ionic
 ion-progress-bar,css-prop,--progress-background,ios
 ion-progress-bar,css-prop,--progress-background,md
 ion-progress-bar,part,progress

core/src/components/accordion-group/accordion-group.ionic.scss

@@ -5,9 +5,9 @@
 // --------------------------------------------------
 
 :host {
-  min-width: 272px;
+  min-width: calc(#{globals.$ion-scale-6200} + #{globals.$ion-space-600});
 
-  background-color: globals.$ion-primitives-base-white;
+  background-color: globals.$ion-bg-neutral-subtlest-default;
 }
 
 // Inset Accordion Group