fix(connectivity_check): use ES modules instead of CommonJS

Switch lambda package from CommonJS to ES modules to be consistent with
scripts directory and avoid mixing module systems. Updated package.json
type field and tsconfig.json module target to ES2022.

Addresses PR #79 review comment from smayberry about avoiding mixed
import/require statements.

Task: PLATEXP-11106

Author: sai-praveen-os

modules/connectivity_check/lambda/package.json

@@ -1,7 +1,7 @@
 {
   "name": "connectivity-check-lambda",
   "version": "1.0.0",
-  "type": "commonjs",
+  "type": "module",
   "engines": {
     "node": "~22"
   },

modules/connectivity_check/lambda/tsconfig.json

@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "target": "ES2022",
-    "module": "commonjs",
+    "module": "ES2022",
     "lib": ["ES2022"],
     "outDir": ".",
     "rootDir": ".",