Implement SSH connection pool for runner instances #7203

Job	Run time
compute-version	2s
build-docs / build-docs	1m 24s
build-artifacts / gateway-build	10s
build-artifacts / code-lint	45s
build-artifacts / runner-test (ubuntu-latest)	1m 5s
build-artifacts / runner-test (macos-latest)	53s
build-artifacts / frontend-build	8s
build-artifacts / python-build	19s
build-artifacts / python-test (macos-latest, 3.13)	2m 37s
build-artifacts / python-test (ubuntu-latest, 3.10)	5m 24s
build-artifacts / python-test (macos-latest, 3.11)	2m 29s
build-artifacts / python-test (macos-latest, 3.10)	2m 22s
build-artifacts / python-test (ubuntu-latest, 3.12)	5m 20s
build-artifacts / python-test (ubuntu-latest, 3.11)	5m 18s
build-artifacts / python-test (macos-latest, 3.12)	2m 32s
build-artifacts / python-test (ubuntu-latest, 3.13)	5m 12s
build-artifacts / python-test (windows-latest, 3.10)	2m 30s
build-artifacts / python-test (windows-latest, 3.11)	2m 13s
build-artifacts / generate-json-schema	21s
build-artifacts / python-test (windows-latest, 3.12)	2m 13s
build-artifacts / python-test (windows-latest, 3.13)	2m 4s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	37s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	52s
upload-pre-pypi-artifacts / upload-pre-pypi-artifacts	16s
upload-post-pypi-artifacts / upload-post-pypi-artifacts	14s
	47m 20s

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