Build

Introduce `InstanceAvailability.NO_BALANCE` (for external integration… #5238

Job	Run time
frontend-build	9s
code-lint	42s
runner-test (macos-latest)	39s
runner-test (ubuntu-latest)	53s
docs-build	1m 28s
gateway-build	16s
python-test (macos-latest, 3.9)	1m 39s
python-test (macos-latest, 3.10)	1m 57s
python-test (macos-latest, 3.13)	1m 17s
python-test (macos-latest, 3.12)	1m 21s
python-test (ubuntu-latest, 3.10)	3m 34s
python-test (macos-latest, 3.11)	1m 32s
python-test (ubuntu-latest, 3.11)	3m 23s
python-test (ubuntu-latest, 3.12)	3m 28s
python-test (ubuntu-latest, 3.9)	3m 30s
python-test (windows-latest, 3.11)	1m 16s
python-test (windows-latest, 3.10)	1m 21s
python-test (ubuntu-latest, 3.13)	3m 25s
python-test (windows-latest, 3.9)	1m 5s
python-test (windows-latest, 3.13)	1m 18s
python-test (windows-latest, 3.12)	1m 35s
runner-compile (ubuntu-24.04-arm, linux, arm64)	34s
runner-compile (ubuntu-24.04, linux, amd64)	43s
runner-upload	15s
update-get-dstack	8s
generate-json-schema	20s
	37m 48s

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