Static binary build for 2.4.x branch #802

Job	Run time
Install and Test on Ubuntu	9m 57s
Install and test OCaml versions on Ubuntu (4.05.0)	6m 43s
Install and test OCaml versions on Ubuntu (4.05.0+flambda)	7m 0s
Install and test OCaml versions on Ubuntu (4.06.1)	6m 47s
Install and test OCaml versions on Ubuntu (4.06.1+flambda)	6m 48s
Install and test OCaml versions on Ubuntu (4.07.1)	6m 59s
Install and test OCaml versions on Ubuntu (4.07.1+flambda)	6m 52s
Install and test OCaml versions on Ubuntu (4.08.1)	6m 40s
Install and test OCaml versions on Ubuntu (4.08.1+flambda)	6m 41s
Install and test OCaml versions on Ubuntu (4.09.1)	6m 43s
Install and test OCaml versions on Ubuntu (4.09.1+flambda)	6m 56s
Install and test OCaml versions on Ubuntu (4.11.1)	6m 24s
Install and test OCaml versions on Ubuntu (4.11.1+flambda)	6m 57s
	1h 31m 27s

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