SCons: Fix import clash between Godot and system modules

See #24965 for details. `sys.path.insert` is hacky, but should work
relatively well for both Python 2 and Python 3. When we eventually
deprecate Python 2 support, we could look into using importlib.

Fixes #24965.

(cherry picked from commit 644b266bae)

SConstruct

@@ -2,12 +2,13 @@
 
 EnsureSConsVersion(0, 98, 1)
 
-
-import string
-import os
-import os.path
+# System
 import glob
+import os
+import string
 import sys
+
+# Local
 import methods
 
 # moved below to compensate with module version string
@@ -30,7 +31,7 @@ for x in glob.glob("platform/*"):
         continue
     tmppath = "./" + x
 
-    sys.path.append(tmppath)
+    sys.path.insert(0, tmppath)
     import detect
 
     if (os.path.exists(x + "/export/export.cpp")):
@@ -138,7 +139,6 @@ customs = ['custom.py']
 
 profile = ARGUMENTS.get("profile", False)
 if profile:
-    import os.path
     if os.path.isfile(profile):
         customs.append(profile)
     elif os.path.isfile(profile + ".py"):
@@ -214,7 +214,7 @@ for k in platform_opts.keys():
 for x in module_list:
     module_enabled = True
     tmppath = "./modules/" + x
-    sys.path.append(tmppath)
+    sys.path.insert(0, tmppath)
     import config
     enabled_attr = getattr(config, "is_enabled", None)
     if (callable(enabled_attr) and not config.is_enabled()):
@@ -234,14 +234,6 @@ env_base.Append(CPPPATH=['#core', '#core/math', '#editor', '#drivers', '#'])
 env_base.platform_exporters = platform_exporters
 env_base.platform_apis = platform_apis
 
-"""
-sys.path.append("./platform/"+env_base["platform"])
-import detect
-detect.configure(env_base)
-sys.path.remove("./platform/"+env_base["platform"])
-sys.modules.pop('detect')
-"""
-
 if (env_base['target'] == 'debug'):
     env_base.Append(CPPFLAGS=['-DDEBUG_MEMORY_ALLOC'])
     env_base.Append(CPPFLAGS=['-DSCI_NAMESPACE'])
@@ -265,8 +257,8 @@ elif env_base['p'] != "":
 
 
 if selected_platform in platform_list:
-
-    sys.path.append("./platform/" + selected_platform)
+    tmppath = "./platform/" + selected_platform
+    sys.path.insert(0, tmppath)
     import detect
     if "create" in dir(detect):
         env = detect.create(env_base)
@@ -391,7 +383,7 @@ if selected_platform in platform_list:
 
     suffix += env.extra_suffix
 
-    sys.path.remove("./platform/" + selected_platform)
+    sys.path.remove(tmppath)
     sys.modules.pop('detect')
 
     env.module_list = []
@@ -401,7 +393,7 @@ if selected_platform in platform_list:
         if not env['module_' + x + '_enabled']:
             continue
         tmppath = "./modules/" + x
-        sys.path.append(tmppath)
+        sys.path.insert(0, tmppath)
         env.current_module = x
         import config
         if (config.can_build(selected_platform)):