Remove `disable_combine_sarif_files` feature flag #7257

Job	Run time
Packaging: Config file (ubuntu-latest, linked)	1m 27s
Packaging: Config file (ubuntu-latest, default)	1m 2s
Packaging: Config file (macos-latest, nightly-latest)	1m 33s
Packaging: Config file (macos-latest, default)	2m 11s
Packaging: Config file (macos-latest, linked)	1m 34s
Packaging: Config file (windows-latest, nightly-latest)	5m 2s
Packaging: Config file (windows-latest, default)	2m 56s
Packaging: Config file (windows-latest, linked)	3m 59s
Packaging: Config file (ubuntu-latest, nightly-latest)	1m 28s
Packaging: Config file (ubuntu-latest, default)	1m 2s
Packaging: Config file (macos-latest, default)	2m 11s
Packaging: Config file (windows-latest, nightly-latest)	4m 6s
Packaging: Config file (windows-latest, linked)	3m 59s
Packaging: Config file (macos-latest, linked)	1m 34s
Packaging: Config file (windows-latest, default)	2m 17s
Packaging: Config file (ubuntu-latest, linked)	1m 27s
Packaging: Config file (ubuntu-latest, nightly-latest)	1m 28s
Packaging: Config file (macos-latest, nightly-latest)	1m 33s
	40m 49s

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