test(developer): add test for ERROR_DescriptionIsMissing to kmc-keybo…

…ard-info

Originally reported in #12202. Check was added in #12204, backported to
17.0.329 in #12207, but #12597 reports this for 17.0.331. So added test
to verify that it is working as expected (it is).

Note that this only applies when using the `--for-publishing` build flag
in kmc, because it is checked in the kmc-keyboard-info stage. Guessing
this is where the confusion arose.

Consolidated tests which used a common pattern for kmc-keyboard-info
calls. The remaining tests do stubs or calls into internal functions, so
they cannot be easily deduped.

Fixes: #12597

developer/src/kmc-keyboard-info/test/fixtures/error_description_is_missing/LICENSE.md

@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2015-2022 SIL International
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

developer/src/kmc-keyboard-info/test/fixtures/error_description_is_missing/build/.gitattributes

@@ -0,0 +1 @@
+khmer_angkor.js -text