Merge actions test data struct and some of the data for the actions API
unit tests. actions_update_app_context_nfu.tests.cpp data has not been
merged because the expected results are different, as it does not do
normalization, unlike actions_get_api and actions_normalize.
Merging of that data could be done, but would require adding extra
fields to each test result, which would make the data considerably
harder to read! Thus I have left it alone for now, just merged the
struct, which is still a win.
Fixes: #15913
* Rename citems and eliminate shadowed class member
* Cleanup is_identical_context and related helper functions and make
consistent name and signature, to assert_identical_context.
* Use clearer variable names for expected and actual values.
Relates-to: #15913
Consolidate test frameworks and cleanup, including:
* all tests use Google Test
* reorganize folders, esp. kmnkbd -> api
* move all api tests into api folder
* replace references to test_assert or test_color with gtest equivalents
* leverage gtest patterns to remove boilerplate code
* dramatically simplify meson.build files and localize variables
* move shared helper code into helpers/ folder
* make test names unique and add gtest protocol for reporting back to
teamcity
Fixes:
* CLDR test keyboards had invalid unicodeset escapes (needs to be raised
upstream also) - was not failing tests because files were not loading
but returning success
Test-bot: skip
