Add tests for getCredentials with multiple goproxy_servers and maven_… #11982

Job	Run time
analyze-other (python)	58s
analyze-other (actions)	51s
check-codeql-versions	16s
analyze-javascript (windows-2022)	6m 23s
analyze-javascript (windows-2025)	5m 27s
analyze-javascript (ubuntu-24.04, linked)	4m 17s
analyze-javascript (ubuntu-22.04)	4m 50s
analyze-javascript (macos-14, linked)	8m 35s
analyze-javascript (macos-15)	9m 46s
analyze-javascript (windows-2022, linked)	5m 22s
analyze-javascript (ubuntu-24.04)	4m 27s
analyze-javascript (macos-14)	8m 10s
analyze-javascript (windows-2025, linked)	6m 40s
analyze-javascript (macos-15, linked)	7m 9s
analyze-javascript (ubuntu-22.04, linked)	4m 59s
	1h 18m 10s

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