This fixes a bug in the API verification if the stable branch doesn't
have the expected .symbols file.

The new `api-verification` workflow runs after `deb-packaging`.

Implements #10626.

auto: increment master version to 17.0.261

chore(linux): Fix API check if lines got removed in .symbols file

docs(linux): Update sample settings

fix(linux): Fix path to artifacts when uploading to llso

chore(oem/fv): Update versions in keyboards.csv

If lines got removed in the .symbols file we won't find the current
version number in the .symbols file. This change fixes the expectations.

Also, if a major API change happens during the Alpha cycle we don't expect
another API version increment if one already happened since we released
the stable version.

This change also adds some unit tests for the new functionality. These
can be run manually and won't run during CI builds.

Fixes #10453.

auto: increment master version to 17.0.260

Python debugger in vscode >= 1.86 now uses a different type.

With the new download-artifact version when using `merge-multiple:true`
all artifacts end up in the same directory. This change adjusts for that.

Another follow-up of #10577.

chore(linux): Update debian changelog 🍒

chore(common): history missing message fixup

chore(common): Add entries from 16.0.145 HISTORY.md

Not sure why this is happening, nothing obvious in logs. Will monitor.

fix(linux): Fix version comparison

chore(linux): Use correct format specifier for `g_utf8_strlen`

chore(common): cancel earlier builds when new test builds triggered

feat(core,developer): simplify markers 🙀

feat(core): ldml double marker, C++ side 🙀

feat(developer):  double markers once again 🙀

auto: increment master version to 17.0.259

The package build on armhf failed because of the wrong format specifier
which expects a `size_t` instead of `glong` that `g_utf8_strlen` returns.

(cherry picked from commit 8d0f1029)

chore(linux): Fix the path of downloaded artifacts

Follow-up of #10577.

Fixes #10590.

Cancels existing running or queued test builds on TeamCity when a new
build is started for the same 'branch' (aka branch or PR).

Does not touch release builds or other projects -- only touches
recognized test build configurations.

chore(linux): Upgrade artifacts to v4

fix(web): app/webview control flow for initial layer

chore(developer): kmc ldml build - call c8 directly for tests

feat(core): ldml reorder marker processing 🙀 

Merge branch 'feat/core/10317-double-marker2-epic-ldml' into feat/core/10317-simplify-marker-epic-ldml

Merge branch 'feat/core/10317-double-marker-epic-ldml' into feat/core/10317-double-marker2-epic-ldml