Missing "Add circular string" in the "Shape digitizing" toolbar (?)

[DelazJ]

What is the bug or the crash?

There used to be an "Add circular string" tool along with the "Add circular string by radius" one on the Shape digitizing toolbar. It helped to digitize an arc provided three points on it.I can't find it anymore, in master 3.27.

With recent refactoring, it is now possible to create an arc with three points using the common let's say "add feature" tool with the "Digitize with curve" method ON. Is that the reason why the "Add circular string" tool is gone or was its removal a bug? I would have seen a direct tool on the "Shape digitizing toolbar" a good user experience (but maybe more complex on code maintenance?)

If the removal is intended, then the "Add circular string by radius" should probably not display as a menu but a direct tool. A drop-down menu with a single item, that is already "selected" is confusing (makes you wonder if you have a tool missing).

Steps to reproduce the issue

1. Toggle a polygon layer to edit and Enable the "Add features".
2. Enable the "Shape digitizing toolbar"
3. Click the drop-down menu next to the "Add circular string by radius". There is no other item than that one.

Versions

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QGIS version	3.27.0-Master	QGIS code revision	96298db
Qt version	5.15.3
Python version	3.10.4
GDAL/OGR version	3.4.1
PROJ version	8.2.1
EPSG Registry database version	v10.041 (2021-12-03)
GEOS version	3.10.2-CAPI-1.16.0
SQLite version	3.37.2
PostgreSQL client version	unknown
SpatiaLite version	5.0.1
QWT version	6.1.4
QScintilla2 version	2.11.6
OS version	Ubuntu 22.04.1 LTS
This copy of QGIS writes debugging output.
Active Python plugins
db_manager	0.1.20
grassprovider	2.12.99
MetaSearch	0.3.6
processing	2.12.99
sagaprovider	2.12.99

Supported QGIS version

• I'm running a supported QGIS version according to the roadmap.

New profile

• I tried with a new QGIS profile

Additional context

No response