Single module bundle via rollup (#3731)

* Single module bundle via rollup

* use createBundle

* override all

* Update rollup.config.mjs

* Add bundle import

* Remove x-* packages

* Adjust

* Adjust

* Rebuild

* Internal helpers

* Adjust locations

* Bump common

* CHANGELOG

* Update rollup.config.mjs

package.json

@@ -15,6 +15,7 @@
     "build:extra": "(cd packages/typegen && copyfiles scripts/* build)",
     "build:interfaces": "polkadot-types-internal-interfaces",
     "build:release": "polkadot-ci-ghact-build",
+    "build:rollup": "polkadot-exec-rollup --config",
     "docs:metadata": "polkadot-types-internal-metadata",
     "chain:info": "polkadot-types-chain-info",
     "lint": "polkadot-dev-run-lint",