Register credentials extracted from proxy configuration as secrets #4322

Job	Run time
Config export (ubuntu-latest, nightly-latest)	1m 8s
Config export (macos-latest, linked)	1m 3s
Config export (ubuntu-latest, linked)	1m 6s
Config export (windows-latest, linked)	3m 57s
Config export (macos-latest, nightly-latest)	1m 2s
Config export (windows-latest, nightly-latest)	3m 41s
	11m 57s

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