Remove `AnalyzeUseNewUpload` FF and make its behaviour the default #11057

Job	Run time
analyze-other (python)	59s
analyze-other (actions)	52s
check-codeql-versions	34s
analyze-javascript (ubuntu-22.04, linked)	4m 22s
analyze-javascript (ubuntu-24.04, linked)	4m 30s
analyze-javascript (windows-2022)	6m 15s
analyze-javascript (windows-2025, linked)	7m 37s
analyze-javascript (windows-2022, linked)	6m 46s
analyze-javascript (ubuntu-24.04)	4m 37s
analyze-javascript (macos-14)	8m 8s
analyze-javascript (macos-14, linked)	9m 14s
analyze-javascript (macos-15)	10m 58s
analyze-javascript (ubuntu-22.04)	4m 20s
analyze-javascript (macos-15, linked)	10m 14s
analyze-javascript (windows-2025)	6m 59s
	1h 26m 25s

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