Add CLI deprecation warnings about gateway routers (#3814) #6950

Job	Run time
compute-version	2s
build-docs / build-docs	1m 14s
build-artifacts / frontend-build	13s
build-artifacts / code-lint	53s
build-artifacts / runner-test (ubuntu-latest)	59s
build-artifacts / runner-test (macos-latest)	1m 1s
build-artifacts / gateway-build	18s
build-artifacts / python-build	18s
build-artifacts / generate-json-schema	18s
build-artifacts / python-test (macos-latest, 3.11)	3m 30s
build-artifacts / python-test (ubuntu-latest, 3.9)	4m 45s
build-artifacts / python-test (macos-latest, 3.12)	3m 32s
build-artifacts / python-test (macos-latest, 3.9)	2m 53s
build-artifacts / python-test (ubuntu-latest, 3.13)	4m 26s
build-artifacts / python-test (ubuntu-latest, 3.11)	5m 11s
build-artifacts / python-test (macos-latest, 3.13)	2m 38s
build-artifacts / python-test (windows-latest, 3.9)	3m 46s
build-artifacts / python-test (windows-latest, 3.10)	2m 2s
build-artifacts / python-test (windows-latest, 3.13)	2m 15s
build-artifacts / python-test (ubuntu-latest, 3.10)	5m 22s
build-artifacts / python-test (ubuntu-latest, 3.12)	4m 43s
build-artifacts / python-test (windows-latest, 3.12)	2m 52s
build-artifacts / python-test (windows-latest, 3.11)	2m 19s
build-artifacts / python-test (macos-latest, 3.10)	3m 0s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	29s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	29s
upload-pre-pypi-artifacts / upload-pre-pypi-artifacts	20s
upload-post-pypi-artifacts / upload-post-pypi-artifacts	19s
	1h 0m 7s

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