feat(progress-bar): add status prop (#1560)

* ProgressBar status feature added

* ProgressBar: Removed the css variables and use carbon-css instead.
The way of assigning the ProgressBar value has change. It is now a style
variable and scale-x is calculated in the css. This way prevent the
override of carbon css.

* Removed an unessacery span.

* Removed an unnecessary span.

* Added the status for the ProgressBarUx

* Remove `style css` and update docs.

* - Fixed the `capped` variable for more readability
- Updated docs `label` and `helperText`
- Updated docs and css

* fix: finished/error states cannot be indeterminate

* Run "yarn build:css"

* Re-run "yarn build:docs"

* test(progress-bar): assert `status` prop

* chore: add aria-busy and set valuenow to 0 when not active

---------

Co-authored-by: Eric Liu <ericyl.us@gmail.com>
Co-authored-by: Enrico Sacchetti <enrico@theetrain.ca>

docs/src/COMPONENT_API.json

@@ -8973,6 +8973,18 @@
           "constant": false,
           "reactive": false
         },
+        {
+          "name": "status",
+          "kind": "let",
+          "description": "Specify the status",
+          "type": "\"active\" | \"finished\" | \"error\"",
+          "value": "\"active\"",
+          "isFunction": false,
+          "isFunctionDeclaration": false,
+          "isRequired": false,
+          "constant": false,
+          "reactive": false
+        },
         {
           "name": "size",
           "kind": "let",