Expose wc_CryptoCb_GetDevice and add CryptoCb API test coverage #6323

Job	Run time
build module (EXTRA_CPPFLAGS=-Werror --enable-option-checking=fatal --enable-linuxkm --enable-lin...	2m 0s
build module (EXTRA_CPPFLAGS=-Werror --enable-option-checking=fatal --enable-linuxkm --enable-lin...	1m 45s
build module (EXTRA_CPPFLAGS=-Werror --enable-option-checking=fatal --enable-linuxkm --enable-tls...	1m 10s
	4m 55s

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