SwiftWin32: further adopt static libraries on 5.7+ #410

Job	Run time
Swift 5.4.3-RELEASE	3m 18s
Swift 5.4.3-RELEASE	3m 18s
Swift 5.5.3-RELEASE	2m 50s
Swift 5.5.3-RELEASE	2m 50s
Swift 5.6.3-RELEASE	2m 46s
Swift 5.6.3-RELEASE	2m 46s
Swift 5.7.3-RELEASE	3m 48s
Swift 5.7.3-RELEASE	3m 48s
Swift 5.8.1-RELEASE	4m 15s
Swift 5.8.1-RELEASE	4m 15s
Swift 5.9.1-RELEASE	1m 52s
Swift 5.9.1-RELEASE	3m 57s
Swift DEVELOPMENT-SNAPSHOT-2023-08-12-a	3m 43s
Swift DEVELOPMENT-SNAPSHOT-2023-08-12-a	3m 43s
	47m 9s

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