changing version_gpg_keys to json file as per PR comments

docker/common.py

@@ -19,15 +19,26 @@
 import tempfile
 import os
 from distutils.dir_util import copy_tree
-from version_gpg_keys import version_gpg_keys
+import json
 import shutil
 import sys
 import re
 
+def load_version_gpg_keys():
+    '''
+    Loads the version-specific GPG keys from the 'version_gpg_keys.json' file.
+    '''
+    script_dir = os.path.dirname(os.path.abspath(__file__))
+    json_file = os.path.join(script_dir, 'version_gpg_keys.json')
+    with open(json_file, 'r') as f:
+        version_gpg_keys = json.load(f)
+    return version_gpg_keys
+
 def get_gpg_key(kafka_version):
     """
     Retrieves the GPG key for the specified kafka version, if it exists, from docker/version_gpg_keys.py.
     """
+    version_gpg_keys = load_version_gpg_keys()
     gpg_key = version_gpg_keys.get(kafka_version)
     if gpg_key is not None:
         return gpg_key

docker/version_gpg_keys.json

@@ -0,0 +1,5 @@
+{
+    "3.7.0": "7C38C2F6E7DF40E527C7C996DE0D9D12FB1360DA",
+    "3.7.1": "4687E2BC1319B57B321D6F0E39AB5531A7FCB08E",
+    "3.8.0": "CF9500821E9557AEB04E026C05EEA67F87749E61"
+}