api!: remove dc_all_work_done() #17319

Job	Run time
cargo deny	39s
Rust doc comments	4m 1s
Build C library (ubuntu-latest)	8m 21s
Build C library (macos-latest)	7m 35s
Lint Rust	2m 49s
Check if node constants are up to date	6s
Check provider database	7s
Python lint	14s
Build deltachat-rpc-server (ubuntu-latest)	7m 37s
Build deltachat-rpc-server (macos-latest)	2m 35s
Rust tests (ubuntu-latest, 1.83.0)	3m 23s
Build deltachat-rpc-server (windows-latest)	4m 51s
Rust tests (windows-latest, 1.83.0)	9m 11s
Rust tests (macos-latest, 1.83.0)	4m 20s
Rust tests (ubuntu-latest, 1.77.0)	3m 33s
JSON-RPC Python tests (ubuntu-latest, 3.13)	1m 59s
JSON-RPC Python tests (macos-latest, 3.13)	1m 52s
JSON-RPC Python tests (windows-latest, 3.13)	3m 22s
JSON-RPC Python tests (ubuntu-latest, pypy3.10)	1m 50s
JSON-RPC Python tests (macos-latest, pypy3.10)	2m 26s
JSON-RPC Python tests (ubuntu-latest, 3.7)	1m 54s
CFFI Python tests (ubuntu-latest, 3.13)	4m 57s
CFFI Python tests (macos-latest, 3.13)	5m 22s
CFFI Python tests (ubuntu-latest, pypy3.10)	6m 7s
CFFI Python tests (macos-latest, pypy3.10)	5m 19s
CFFI Python tests (ubuntu-latest, 3.7)	4m 47s
	1h 39m 17s

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