Add polling based window waiting for testbed #7491

Job	Run time
Check towncrier / Towncrier Checks	35s
Pre-commit checks / Pre-commit Checks	36s
Package Toga (android) / Create Python Package	18s
Package Toga (cocoa) / Create Python Package	19s
Package Toga (core) / Create Python Package	16s
Package Toga (demo) / Create Python Package	16s
Package Toga (dummy) / Create Python Package	15s
Package Toga (gtk) / Create Python Package	23s
Package Toga (iOS) / Create Python Package	24s
Package Toga (textual) / Create Python Package	18s
Package Toga (toga) / Create Python Package	16s
Package Toga (web) / Create Python Package	17s
Package Toga (winforms) / Create Python Package	25s
MicroPython compatibility	35s
Test core (macos-latest, 3.9)	1m 0s
Test core (macos-latest, 3.10)	1m 13s
Test core (macos-latest, 3.11)	1m 1s
Test core (macos-latest, 3.12)	43s
Test core (macos-latest, 3.13)	50s
Test core (ubuntu-latest, 3.9)	51s
Test core (ubuntu-latest, 3.10)	53s
Test core (ubuntu-latest, 3.11)	58s
Test core (ubuntu-latest, 3.12)	1m 7s
Test core (ubuntu-latest, 3.13)	1m 25s
Test core (windows-latest, 3.9)	1m 47s
Test core (windows-latest, 3.10)	1m 47s
Test core (windows-latest, 3.11)	1m 44s
Test core (windows-latest, 3.12)	1m 56s
Test core (windows-latest, 3.13)	2m 39s
Coverage	31s
Testbed (macOS-x86_64)	7m 19s
Testbed (macOS-arm64)	1m 26s
Testbed (windows)	7m 45s
Testbed (linux-x11)	4m 54s
Testbed (linux-wayland)	5m 12s
Testbed (android)	10m 40s
Testbed (iOS)	6m 18s
Testbed (textual-linux)	53s
Testbed (textual-macOS)	1m 10s
Testbed (textual-windows)	2m 24s
	1h 13m 39s

Provide feedback