rename compute_* lemmas to _beta lemmas #1962

Job	Run time
nix	2m 20s
quick-build (supported, ubuntu-latest)	1m 56s
opam-build (supported, ubuntu-latest)	3m 52s
build (supported)	1m 54s
opam-build (latest, ubuntu-latest)	4m 45s
build (latest)	3m 22s
quick-build (latest, ubuntu-latest)	3m 15s
opam-build (dev, ubuntu-latest)	4m 29s
build (dev, --warnings)	3m 18s
quick-build (dev, ubuntu-latest)	3m 8s
doc-timing	0s
doc-coqdoc	0s
doc-dep-graphs	0s
doc-alectryon	0s
coqchk	0s
install	0s
deploy-doc	0s
delete-artifacts	5s
	32m 24s

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