CI self+toolchain

Fix CI using deprecated version of actions/upload-artifact #1133

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Run time

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Job	Run time
macos-12 gcc^10	17m 5s
macos-12 gcc^11	14m 28s
macos-12 gcc^12	16m 38s
macos-12 gcc^13	14m 17s
macos-12 gcc^14	20m 0s
ubuntu-latest gcc^10	9m 45s
ubuntu-latest gcc^11	9m 9s
ubuntu-latest gcc^12	9m 26s
ubuntu-latest gcc^13	10m 2s
ubuntu-latest gcc^14	9m 28s
windows-latest gcc^10	19m 34s
windows-latest gcc^11	18m 47s
windows-latest gcc^12	18m 49s
windows-latest gcc^13	17m 33s
windows-latest gcc^14	17m 21s
	3h 42m 22s