Register credentials extracted from proxy configuration as secrets #4269

Job	Run time
Diagnostic export (macos-latest, linked)	1m 30s
Diagnostic export (ubuntu-latest, nightly-latest)	1m 6s
Diagnostic export (ubuntu-latest, linked)	58s
Diagnostic export (macos-latest, nightly-latest)	1m 27s
Diagnostic export (windows-latest, nightly-latest)	4m 0s
Diagnostic export (windows-latest, linked)	3m 27s
	12m 28s

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