Add default config file location for init action #3979

Job	Run time
Diagnostic export (macos-latest, nightly-latest)	1m 21s
Diagnostic export (windows-latest, linked)	3m 31s
Diagnostic export (ubuntu-latest, linked)	1m 3s
Diagnostic export (ubuntu-latest, nightly-latest)	1m 3s
Diagnostic export (macos-latest, linked)	1m 42s
Diagnostic export (windows-latest, nightly-latest)	4m 33s
	13m 13s

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