tests: random: Move and rename rng test

Random number generator is a subsystem and although it is mostly used
in crypto, this is not its only utility.

Move the current random number generator test to it is own space
(tests/subsys/random) and rename it to rng.

We need more and better tests for rng, this is an initial commit
to organize it and get ready for further tests.

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>

tests/subsys/random/rng/src/main.c

@@ -26,7 +26,7 @@
  *
  */
 
-ZTEST(rand32_common, test_rand32)
+ZTEST(rng_common, test_rand32)
 {
 	uint32_t gen, last_gen, tmp;
 	int rnd_cnt;
@@ -115,4 +115,4 @@ ZTEST(rand32_common, test_rand32)
 #endif /* CONFIG_CSPRNG_ENABLED */
 }
 
-ZTEST_SUITE(rand32_common, NULL, NULL, NULL, NULL, NULL);
+ZTEST_SUITE(rng_common, NULL, NULL, NULL, NULL, NULL);

tests/subsys/random/rng/testcase.yaml

@@ -4,27 +4,27 @@ common:
     - random
     - security
 tests:
-  crypto.rand32:
+  crypto.rng:
     min_ram: 16
     integration_platforms:
       - qemu_x86
-  crypto.rand32.random_sw_systimer:
+  crypto.rng.random_sw_systimer:
     extra_args: CONF_FILE=prj_sw_random_systimer.conf
     integration_platforms:
       - qemu_x86
-  crypto.rand32.random_hw_xoshiro:
+  crypto.rng.random_hw_xoshiro:
     extra_args: CONF_FILE=prj_hw_random_xoshiro.conf
     filter: CONFIG_ENTROPY_HAS_DRIVER
     min_ram: 16
     integration_platforms:
       - native_sim
-  crypto.rand32.random_ctr_drbg:
+  crypto.rng.random_ctr_drbg:
     extra_args: CONF_FILE=prj_ctr_drbg.conf
     filter: CONFIG_ENTROPY_HAS_DRIVER
     min_ram: 16
     integration_platforms:
       - native_sim
-  drivers.rand32.random_psa_crypto:
+  drivers.rng.random_psa_crypto:
     filter: CONFIG_BUILD_WITH_TFM
     arch_exclude: posix
     extra_args: