community/ayatana-indicator-application: disable check due to no tests

Resolve No tests were found!!! error causing build failure with abuild 3.14.0 on a 3.21 builder. Ref: #16519 (closed)

Upstream has disabled running unit tests wih no tests given as the reason and they currently remain commented out. No test files were found in the directories specified in CTestTestfile.cmake. Since they were commented out without removing the scaffolding, the MR retains the check() function and adds options="!check", with minor adjustments from linting.

.build.yml: Comment out running unit tests (no tests in project)