i18n Numbering Systems Testing: Issue with group separator

[geospatialem]

Actual Behavior

In the Calcite input component:

With the locale "ar-SA" and the numberingSystem "arab", the numbers change from arab to latn after typing 5 numbers consecutively, like "12345".

via Ben:

"It looks like it is because of the group separator"

Expected Behavior

The numbers in the input to remain in the arab numbering system.

Reproduction Sample

https://codepen.io/ainermfc/pen/KKeWoOg

Reproduction Steps

1. Set the locale to "ar-SA"
2. Set the numberingSystem to "arab"
3. Set dir to "rtl"
4. Add groupSeparator
5. Type more than 5 digits into the input

Reproduction Version

1.0.0-beta.97

Relevant Info

Spurred from #5920, which had two distinct issues. cc @annierm18 @benelan

Regression?

v1.0.0-beta.97

Priority impact

p3 - not time sensitive

Impact

No response

Esri team

N/A