Rename 2 testing only functions in random.move (MystenLabs#17225)

## Description 

Rename 2 testing only functions in random.move 

## Test plan 

How did you test the new or updated feature?

---

## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

For each box you select, include information after the relevant heading
that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:

crates/sui-framework/packages/sui-framework/sources/random.move

@@ -311,16 +311,16 @@ module sui::random {
     /// Random generator from a non-deterministic seed.
     /// To be used when non-deterministic randomness is needed in tests (e.g., fuzzing).
     public fun new_generator_for_testing(): RandomGenerator {
-        let seed = generate_rand_seed();
-        new_generator_from_seed(seed)
+        let seed = generate_rand_seed_for_testing();
+        new_generator_from_seed_for_testing(seed)
     }
 
     #[test_only]
     /// Random generator from a given seed.
-    public fun new_generator_from_seed(seed: vector<u8>): RandomGenerator {
+    public fun new_generator_from_seed_for_testing(seed: vector<u8>): RandomGenerator {
         RandomGenerator { seed, counter: 0, buffer: vector[] }
     }
 
     #[test_only]
-    native fun generate_rand_seed(): vector<u8>;
+    native fun generate_rand_seed_for_testing(): vector<u8>;
 }

sui-execution/latest/sui-move-natives/src/lib.rs

@@ -859,8 +859,8 @@ pub fn all_natives(silent: bool) -> NativeFunctionTable {
         ),
         (
             "random",
-            "generate_rand_seed",
-            make_native!(random::generate_rand_seed),
+            "generate_rand_seed_for_testing",
+            make_native!(random::generate_rand_seed_for_testing),
         ),
         (
             "zklogin_verified_id",

sui-execution/latest/sui-move-natives/src/random.rs

@@ -11,7 +11,7 @@ use rand::Rng;
 use smallvec::smallvec;
 use std::collections::VecDeque;
 
-pub fn generate_rand_seed(
+pub fn generate_rand_seed_for_testing(
     _context: &mut NativeContext,
     _ty_args: Vec<Type>,
     _args: VecDeque<Value>,