ui: refactor text file component (#18458)

* wip tests

* Move text-file to addon

* rename fileName to filename, initial cleanup of text-fil

* rename args, rename test selector

* fix eye-con, remove enterAsText from file object

* add tests

* move files back to original location

* rename files via git for git diff

* adjsut test

* Revert "wip tests"

This reverts commit 63716a1e647a0b01236d34322837456ef3e9db43.

* fix policy form input

* cleanup conditional

* add bottom margin

* add element id

* change arg name

* add text area input test

* add upload test to policy form

Co-authored-by: Chelsea Shaw <cshaw@hashicorp.com>

ui/app/components/file-to-array-buffer.js

@@ -23,7 +23,7 @@ export default Component.extend({
   fileHelpText: null,
 
   file: null,
-  fileName: null,
+  filename: null,
   fileSize: null,
   fileLastModified: null,
 
@@ -54,7 +54,7 @@ export default Component.extend({
       const { name, size, lastModifiedDate } = fileMeta || {};
       const fileSize = size ? filesize(size) : null;
       this.set('file', fileAsBytes);
-      this.set('fileName', name);
+      this.set('filename', name);
       this.set('fileSize', fileSize);
       this.set('fileLastModified', lastModifiedDate);
       this.onChange(fileAsBytes, name);