test: Add coverage for res_crypto

We're validating the following functionality:

encrypting a block of data with RSA
decrypting a block of data with RSA
signing a block of data with RSA
verifying a signature with RSA
encrypting a block of data with AES-ECB
encrypting a block of data with AES-ECB

as well as accessing test keys from the keystore.

ASTERISK-30045 #close

Change-Id: I0d10e7b41009c5290a4356c6480e636712d5c96d

tests/keys/rsa_key1.key

@@ -0,0 +1,15 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

tests/keys/rsa_key1.pub

@@ -0,0 +1,6 @@
+-----BEGIN PUBLIC KEY-----
+MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC206PN7hvmoc0p1urAeKozmUha
+/h3KIAIO4DG5Muz6x3ZribdxcKfgmw28FwamAGT1n0y1+qGkL1vyHY4YMDjHVVSL
+B8h5Je89UxgXxl/PUpSx4kFNgZofk28Mx1lG2aLEBHXFNhrjZbdfZzeljZHYfrsL
+f9nxQvYeA0W2YJ3g1wIDAQAB
+-----END PUBLIC KEY-----