Merge remote-tracking branch 'origin/fix-OAI_RNGSEED-usage' into integration_2025_w49 (!3786)

Consistently use OAI_RNGSEED env variable for RNG

use OAI_RNGSEED env variable everywhere. Hide normal table
initialization of Ziggurat generator from outside. Fix atoi() to use
stroul()

executables/nr-softmodem.c

@@ -546,7 +546,6 @@ int main( int argc, char **argv ) {
 #if T_TRACER
   T_Config_Init();
 #endif
-  //randominit (0);
   set_taus_seed (0);
 
   cpuf=get_cpu_freq_GHz();