Support long C_x #1131

Job	Run time
generate-fstar	2m 1s
check-style	18s
unit-tests-default	50s
unit-tests (lakers-crypto/psa, ead-none)	52s
test-lakers-python	56s
unit-tests (lakers-crypto/psa, ead-authz)	56s
unit-tests (lakers-crypto/rustcrypto, ead-none)	42s
unit-tests (lakers-crypto/rustcrypto, ead-authz)	41s
build-coap-example	49s
build-lakers-c (crypto-rustcrypto)	1m 14s
build-edhoc-package (lakers-crypto/psa)	1m 41s
build-lakers-c (crypto-psa-baremetal)	1m 44s
build-example-for-cortex-m4 (crypto-psa)	2m 26s
build-edhoc-package (lakers-crypto/psa-baremetal)	1m 42s
build-lakers-c (crypto-cryptocell310)	1m 34s
build-lakers-c-example	1m 42s
build-example-for-cortex-m4 (crypto-cryptocell310)	1m 18s
build-edhoc-package (lakers-crypto/cryptocell310)	2m 6s
build-edhoc-package (lakers-crypto/rustcrypto)	1m 19s
run-example-on-qemu (crypto-psa)	2m 14s
release	0s
	27m 5s

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