fix: always set aria-label to text input in a11y mode

[akoreman]

Issue #, if available: NA

Description of changes: We recently allowed users to set custom aria-labels to the text input, we currently only set the label on focus which makes it hard for users to find their custom label for their first input. This fixes that by always setting the label.

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Pull Request Checklist:

• No backwards incompatible changes were made to Ace's public interface which is defined through the main typings file (ace.d.ts) and its references:
  • https://github.com/ajaxorg/ace/blob/master/ace.d.ts
  • https://github.com/ajaxorg/ace/blob/master/ace-modes.d.ts
  • https://github.com/ajaxorg/ace/blob/master/ace-extensions.d.ts

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.67%. Comparing base (2330d80) to head (dd9c26b).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5563   +/-   ##
=======================================
  Coverage   86.67%   86.67%           
=======================================
  Files         593      593           
  Lines       42940    42951   +11     
  Branches     7126     7126           
=======================================
+ Hits        37218    37229   +11     
  Misses       5722     5722           

Flag	Coverage Δ
unittests	86.67% <100.00%> (+<0.01%)	⬆️

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