Use `getDefaultCliVersion` for `start-proxy` #11508

Job	Run time
analyze-other (python)	1m 0s
analyze-other (actions)	53s
check-codeql-versions	4m 48s
analyze-javascript (ubuntu-22.04, linked)	5m 30s
analyze-javascript (ubuntu-24.04, linked)	4m 26s
analyze-javascript (ubuntu-22.04)	4m 44s
analyze-javascript (windows-2022)	6m 50s
analyze-javascript (windows-2025, linked)	7m 21s
analyze-javascript (macos-14, linked)	7m 38s
analyze-javascript (macos-14)	7m 50s
analyze-javascript (windows-2025)	7m 9s
analyze-javascript (windows-2022, linked)	6m 19s
analyze-javascript (macos-15)	10m 23s
analyze-javascript (ubuntu-24.04)	4m 47s
analyze-javascript (macos-15, linked)	8m 43s
	1h 28m 21s

Provide feedback