Disable LEGACY_REPO_DIR with feature flag #5835

Job	Run time
compute-version	3s
build-docs / build-docs	1m 20s
build-artifacts / gateway-build	14s
build-artifacts / code-lint	56s
build-artifacts / frontend-build	11s
build-artifacts / runner-test (macos-latest)	1m 4s
build-artifacts / runner-test (ubuntu-latest)	58s
build-artifacts / python-build	23s
build-artifacts / generate-json-schema	19s
build-artifacts / python-test (macos-latest, 3.9)	2m 14s
build-artifacts / python-test (macos-latest, 3.10)	2m 9s
build-artifacts / python-test (macos-latest, 3.11)	3m 19s
build-artifacts / python-test (macos-latest, 3.13)	3m 11s
build-artifacts / python-test (ubuntu-latest, 3.10)	3m 51s
build-artifacts / python-test (ubuntu-latest, 3.9)	4m 18s
build-artifacts / python-test (ubuntu-latest, 3.11)	4m 8s
build-artifacts / python-test (macos-latest, 3.12)	2m 59s
build-artifacts / python-test (ubuntu-latest, 3.12)	4m 11s
build-artifacts / python-test (ubuntu-latest, 3.13)	4m 9s
build-artifacts / python-test (windows-latest, 3.9)	2m 15s
build-artifacts / python-test (windows-latest, 3.10)	3m 6s
build-artifacts / python-test (windows-latest, 3.12)	2m 18s
build-artifacts / python-test (windows-latest, 3.11)	2m 1s
build-artifacts / python-test (windows-latest, 3.13)	2m 22s
build-artifacts / runner-compile (ubuntu-24.04-arm, linux, arm64)	31s
build-artifacts / runner-compile (ubuntu-24.04, linux, amd64)	42s
upload-post-pypi-artifacts / upload-post-pypi-artifacts	19s
upload-pre-pypi-artifacts / upload-pre-pypi-artifacts	22s
	53m 53s

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