feat(core): Introduce object store service (#7225)

Depends on https://github.com/n8n-io/n8n/pull/7220 | Story:
[PAY-840](https://linear.app/n8n/issue/PAY-840/introduce-object-store-service-and-manager-for-binary-data)

This PR introduces an object store service for Enterprise edition. Note
that the service is tested but currently unused - it will be integrated
soon as a binary data manager, and later for execution data.
`amazonaws.com` in the host is temporarily hardcoded until we integrate
the service and test against AWS, Cloudflare and Backblaze, in the next
PR.

This is ready for review - the PR it depends on is approved and waiting
for CI.

---------

Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/core/package.json

@@ -34,6 +34,7 @@
     "bin"
   ],
   "devDependencies": {
+    "@types/aws4": "^1.5.1",
     "@types/concat-stream": "^2.0.0",
     "@types/cron": "~1.7.1",
     "@types/crypto-js": "^4.0.1",
@@ -41,13 +42,15 @@
     "@types/lodash": "^4.14.195",
     "@types/mime-types": "^2.1.0",
     "@types/request-promise-native": "~1.0.15",
-    "@types/uuid": "^8.3.2"
+    "@types/uuid": "^8.3.2",
+    "@types/xml2js": "^0.4.11"
   },
   "peerDependencies": {
     "n8n-nodes-base": "workspace:*"
   },
   "dependencies": {
     "@n8n/client-oauth2": "workspace:*",
+    "aws4": "^1.8.0",
     "axios": "^0.21.1",
     "concat-stream": "^2.0.0",
     "cron": "~1.7.2",
@@ -64,6 +67,7 @@
     "pretty-bytes": "^5.6.0",
     "qs": "^6.10.1",
     "typedi": "^0.10.0",
-    "uuid": "^8.3.2"
+    "uuid": "^8.3.2",
+    "xml2js": "^0.5.0"
   }
 }