Add tests for getCredentials with multiple goproxy_servers and maven_… #12001

Job	Run time
check-codeql-versions	14s
analyze-other (actions)	48s
analyze-other (python)	1m 3s
analyze-javascript (ubuntu-24.04, linked)	4m 40s
analyze-javascript (ubuntu-22.04, linked)	4m 42s
analyze-javascript (ubuntu-22.04)	4m 57s
analyze-javascript (windows-2022, linked)	5m 22s
analyze-javascript (windows-2022)	6m 21s
analyze-javascript (windows-2025, linked)	8m 45s
analyze-javascript (ubuntu-24.04)	4m 40s
analyze-javascript (macos-15, linked)	10m 19s
analyze-javascript (macos-15)	5m 40s
analyze-javascript (macos-14, linked)	7m 35s
analyze-javascript (windows-2025)	5m 34s
analyze-javascript (macos-14)	5m 22s
	1h 16m 2s

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