Support long C_x #1133

Job	Run time
generate-fstar	2m 9s
check-style	22s
test-lakers-python	58s
unit-tests (lakers-crypto/psa, ead-none)	1m 6s
unit-tests-default	47s
unit-tests (lakers-crypto/psa, ead-authz)	49s
unit-tests (lakers-crypto/rustcrypto, ead-none)	43s
unit-tests (lakers-crypto/rustcrypto, ead-authz)	39s
build-edhoc-package (lakers-crypto/psa)	1m 20s
build-example-for-cortex-m4 (crypto-psa)	1m 20s
build-edhoc-package (lakers-crypto/psa-baremetal)	1m 56s
build-coap-example	50s
build-example-for-cortex-m4 (crypto-cryptocell310)	1m 21s
build-edhoc-package (lakers-crypto/cryptocell310)	1m 26s
build-edhoc-package (lakers-crypto/rustcrypto)	1m 17s
build-lakers-c (crypto-rustcrypto)	1m 3s
build-lakers-c-example	1m 37s
run-example-on-qemu (crypto-psa)	1m 50s
build-lakers-c (crypto-psa-baremetal)	1m 34s
build-lakers-c (crypto-cryptocell310)	1m 13s
release	0s
	24m 20s

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