feat: use get_drep_reg_record in test_drep.py

Refactor the test_drep.py to use the get_drep_reg_record function
from governance_utils. This change simplifies the code by removing
manual steps for generating drep registration certificates and
deposit amounts. The function handles these internally, making
the test code cleaner and more maintainable.

cardano_node_tests/tests/tests_conway/test_drep.py

@@ -973,23 +973,17 @@ def test_drep_no_multiple_registration(
         drep_metadata_hash = cluster.g_conway_governance.drep.get_metadata_hash(
             drep_metadata_file=drep_metadata_file
         )
-        deposit_amt = cluster.conway_genesis["dRepDeposit"]
-        drep_keys = cluster.g_conway_governance.drep.gen_key_pair(
-            key_name=temp_template, destination_dir="."
-        )
+
         reqc.cip090.start(url=helpers.get_vcs_link())
-        # Obtain drep registration certificate
-        reg_cert = cluster.g_conway_governance.drep.gen_registration_cert(
-            cert_name=temp_template,
-            deposit_amt=deposit_amt,
-            drep_vkey_file=drep_keys.vkey_file,
+        reg_drep = governance_utils.get_drep_reg_record(
+            cluster_obj=cluster,
+            name_template=temp_template,
             drep_metadata_url=drep_metadata_url,
             drep_metadata_hash=drep_metadata_hash,
-            destination_dir=".",
         )
         tx_files_reg = clusterlib.TxFiles(
-            certificate_files=[reg_cert],
-            signing_key_files=[payment_addr.skey_file, drep_keys.skey_file],
+            certificate_files=[reg_drep.registration_cert],
+            signing_key_files=[payment_addr.skey_file, reg_drep.key_pair.skey_file],
         )
 
         # Submit drep registration certificate
@@ -1000,7 +994,7 @@ def test_drep_no_multiple_registration(
             submit_method=submit_method,
             use_build_cmd=use_build_cmd,
             tx_files=tx_files_reg,
-            deposit=deposit_amt,
+            deposit=reg_drep.deposit,
         )
 
         # Wait for some blocks and again submit drep registration certificate
@@ -1015,7 +1009,7 @@ def test_drep_no_multiple_registration(
                 submit_method=submit_method,
                 use_build_cmd=use_build_cmd,
                 tx_files=tx_files_reg,
-                deposit=deposit_amt,
+                deposit=reg_drep.deposit,
             )
 
         err_msg = str(excinfo.value)