Remove `add-snippets` input #10765

Job	Run time
analyze-other (python)	57s
analyze-other (actions)	49s
check-codeql-versions	34s
analyze-javascript (windows-2022, linked)	5m 0s
analyze-javascript (ubuntu-22.04, linked)	4m 53s
analyze-javascript (ubuntu-22.04)	4m 12s
analyze-javascript (windows-2022)	4m 46s
analyze-javascript (ubuntu-24.04)	4m 20s
analyze-javascript (windows-2025)	8m 0s
analyze-javascript (macos-13)	14m 46s
analyze-javascript (macos-14, linked)	5m 35s
analyze-javascript (macos-14)	5m 52s
analyze-javascript (windows-2025, linked)	6m 21s
analyze-javascript (macos-13, linked)	8m 17s
analyze-javascript (ubuntu-24.04, linked)	4m 12s
analyze-javascript (macos-15)	8m 36s
analyze-javascript (macos-15, linked)	7m 59s
	1h 35m 9s

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