Use Node `fs` APIs instead of `del` #10748

Job	Run time
analyze-other (actions)	54s
analyze-other (python)	57s
check-codeql-versions	35s
analyze-javascript (ubuntu-22.04)	4m 14s
analyze-javascript (ubuntu-24.04, linked)	4m 1s
analyze-javascript (ubuntu-24.04)	4m 16s
analyze-javascript (windows-2022)	5m 44s
analyze-javascript (ubuntu-22.04, linked)	4m 26s
analyze-javascript (windows-2022, linked)	5m 1s
analyze-javascript (macos-14)	5m 50s
analyze-javascript (macos-15, linked)	10m 33s
analyze-javascript (windows-2025)	6m 27s
analyze-javascript (windows-2025, linked)	6m 34s
analyze-javascript (macos-15)	8m 23s
analyze-javascript (macos-13, linked)	7m 36s
analyze-javascript (macos-13)	12m 16s
analyze-javascript (macos-14, linked)	8m 5s
	1h 35m 52s

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