Enable rebuilding PRs with conflicts #7358

Job	Run time
Packaging: Config file (macos-latest, linked)	1m 38s
Packaging: Config file (ubuntu-latest, linked)	1m 27s
Packaging: Config file (windows-latest, linked)	5m 2s
Packaging: Config file (windows-latest, default)	3m 59s
Packaging: Config file (ubuntu-latest, nightly-latest)	1m 30s
Packaging: Config file (ubuntu-latest, default)	1m 23s
Packaging: Config file (macos-latest, default)	2m 28s
Packaging: Config file (macos-latest, nightly-latest)	1m 32s
Packaging: Config file (windows-latest, nightly-latest)	3m 51s
	22m 50s

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