chore(ci): stability for test-core-clean-build (#29338)

Issue number: N/A

---------

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## What is the current behavior?
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CI will fail randomly due to which stylesheet is processed last by
rollup in Stencil. This leads to random failures.

This is caused by some of the new ionic stylesheets not importing the
same common stylesheet that included the CSS variable documentation.

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

- Temporarily copies and pastes the documentation blocks to the affected
ionic stylesheets
- CI should no longer fail randomly when comparing the generated
`api.txt` output
- Adds a technical debt track to track removing these changes once the
bug in Stencil is resolved and released

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

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## Other information

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

core/src/components/card/card.ionic.scss

@@ -5,6 +5,11 @@
 // --------------------------------------------------
 
 :host {
+  // TODO(FW-6178): Remove this once the Stencil bug is resolved.
+  /**
+   * @prop --background: Background of the card
+   * @prop --color: Color of the card
+   */
   --background: #{tokens.$ionic-color-neutral-0};
   --border-radius: #{tokens.$ionic-border-radius-rounded-small};
 

core/src/components/chip/chip.ionic.scss

@@ -9,6 +9,11 @@ $ionic-states-focus-primary: #9ec4fd;
 $ionic-states-hover: #{rgba(#05080f, 0.16)}; // We should review how to make this in the future, as we are setting scss variables with a var() and fallback, and it doesn't work inside a rgba().
 
 :host {
+  // TODO(FW-6178): Remove this once the Stencil bug is resolved.
+  /**
+   * @prop --background: Background of the chip
+   * @prop --color: Color of the chip
+   */
   --background: #{tokens.$ionic-color-neutral-10};
   --border-color: transparent;
   --border-radius: #{tokens.$ionic-border-radius-rounded-small};