Default Python shell integration to true (#25359)

Resolves: #24141 
/cc @cwebster-99

Author: anthonykim1

package.json

@@ -640,7 +640,7 @@
                     "type": "array"
                 },
                 "python.terminal.shellIntegration.enabled": {
-                    "default": false,
+                    "default": true,
                     "markdownDescription": "%python.terminal.shellIntegration.enabled.description%",
                     "scope": "resource",
                     "type": "boolean",