Rename CertParams/BindingParams expiration property to key_expiration. #3811

Job	Run time
cmake-offline-googletest-src	4m 1s
ubuntu-latest [CC gcc; botan; shared libs on; GnuPG stable]	4m 32s
ubuntu-latest [CC clang; botan; shared libs on; GnuPG stable]	4m 8s
cmake-offline-googletest	4m 8s
system-sexpp, sexpp shared libs on, rnp shared libs on	2m 55s
package-source	28s
ubuntu-latest [CC gcc; openssl; shared libs on; GnuPG stable]	4m 49s
system-sexpp, sexpp shared libs on, rnp shared libs off	2m 54s
ubuntu-latest [CC clang; openssl; shared libs on; GnuPG stable]	3m 59s
system-sexpp, sexpp shared libs off, rnp shared libs on	2m 59s
ubuntu-20.04 [CC gcc; openssl; shared libs on; GnuPG stable]	3m 55s
system-sexpp, sexpp shared libs off, rnp shared libs off	2m 48s
ubuntu-latest [CC gcc; botan; shared libs off; GnuPG stable]	4m 11s
package	1m 8s
debian-tests	8s
	47m 3s

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