Use `getDefaultCliVersion` for `start-proxy` #7040

Job	Run time
Go: tracing with autobuilder step (ubuntu-latest, stable-v2.22.4)	1m 34s
Go: tracing with autobuilder step (macos-latest, stable-v2.21.4)	4m 43s
Go: tracing with autobuilder step (macos-latest, stable-v2.20.7)	4m 57s
Go: tracing with autobuilder step (macos-latest, nightly-latest)	7m 48s
Go: tracing with autobuilder step (macos-latest, stable-v2.19.4)	6m 7s
Go: tracing with autobuilder step (ubuntu-latest, stable-v2.20.7)	1m 36s
Go: tracing with autobuilder step (macos-latest, default)	4m 45s
Go: tracing with autobuilder step (ubuntu-latest, default)	1m 20s
Go: tracing with autobuilder step (ubuntu-latest, nightly-latest)	1m 14s
Go: tracing with autobuilder step (macos-latest, stable-v2.22.4)	6m 18s
Go: tracing with autobuilder step (ubuntu-latest, linked)	1m 25s
Go: tracing with autobuilder step (ubuntu-latest, stable-v2.21.4)	1m 57s
Go: tracing with autobuilder step (ubuntu-latest, stable-v2.19.4)	3m 39s
Go: tracing with autobuilder step (ubuntu-latest, stable-v2.17.6)	1m 21s
Go: tracing with autobuilder step (macos-latest, linked)	6m 39s
Go: tracing with autobuilder step (macos-latest, stable-v2.17.6)	4m 59s
Go: tracing with autobuilder step (ubuntu-latest, stable-v2.18.4)	1m 20s
Go: tracing with autobuilder step (macos-latest, stable-v2.18.4)	7m 33s
	1h 9m 15s

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