🐛 RBAC: backend startup fails due to missing mongodb dependency

### Workspace

rbac

### 📜 Description

The `typeorm-adapter` version 1.10.0 contains a bug which prevent the backstage backend to complete the startup process.

The current workaround is to install the `mongdb` dependencie in the backend package

```bash
yarn workspace backend add mongodb@^7.4.0
```

> This issue i know by the `apache/casbin-typeorm-adapter` and a PR has been opened
> https://github.com/apache/casbin-typeorm-adapter/issues/81

### 👍 Expected behavior

The backstage backend should start without adding the `mongodb` package to the `backend` package

### 👎 Actual Behavior with Screenshots

n/a

### 👟 Reproduction steps

Install the `backstage-community/plugin-rbac-backend@7.16.0` in fresh backstage app
launch the app `yarn start`

the app should failt to start the backend

### 📃 Provide the context for the Bug.

Backstage backend fails to start

```bash
Error: Cannot find module 'mongodb'
Require stack:
- /REDACTED/backstage/src/node_modules/typeorm-adapter/lib/casbinMongoRule.js
- /REDACTED/backstage/src/node_modules/typeorm-adapter/lib/index.js
- /REDACTED/backstage/src/node_modules/@backstage-community/plugin-rbac-backend/dist/database/casbin-adapter-factory.cjs.js
- /REDACTED/backstage/src/node_modules/@backstage-community/plugin-rbac-backend/dist/service/policy-builder.cjs.js
- /REDACTED/backstage/src/node_modules/@backstage-community/plugin-rbac-backend/dist/index.cjs.js
at Module._resolveFilename (node:internal/modules/cjs/loader:1383:15)
at defaultResolveImpl (node:internal/modules/cjs/loader:1025:19)
at resolveForCJSWithHooks (node:internal/modules/cjs/loader:1030:22)
at Module._load (node:internal/modules/cjs/loader:1192:37)
at TracingChannel.traceSync (node:diagnostics_channel:322:14)
at wrapModuleLoad (node:internal/modules/cjs/loader:237:24)
at Module.require (node:internal/modules/cjs/loader:1463:12)
at Module.patchedRequire (/REDACTED/backstage/src/node_modules/require-in-the-middle/index.js:186:34)
at Hook._require.Module.require (/REDACTED/backstage/src/node_modules/require-in-the-middle/index.js:134:27)
at require (node:internal/modules/helpers:147:16)
at Object. (/REDACTED/backstage/src/node_modules/typeorm-adapter/lib/casbinMongoRule.js:26:19)
at Module._compile (node:internal/modules/cjs/loader:1706:14)
at Module._extensions..js (node:internal/modules/cjs/loader:1839:10)
at Object.newLoader [as .js] (/REDACTED/backstage/src/node_modules/pirates/lib/index.js:134:7)
at Module.load (node:internal/modules/cjs/loader:1441:32)
at Module._load (node:internal/modules/cjs/loader:1263:12) {
code: 'MODULE_NOT_FOUND',
requireStack: [
'/REDACTED/backstage/src/node_modules/typeorm-adapter/lib/casbinMongoRule.js',
'/REDACTED/backstage/src/node_modules/typeorm-adapter/lib/index.js',
'/REDACTED/backstage/src/node_modules/@backstage-community/plugin-rbac-backend/dist/database/casbin-adapter-factory.cjs.js',
'/REDACTED/backstage/src/node_modules/@backstage-community/plugin-rbac-backend/dist/service/policy-builder.cjs.js',
'/REDACTED/backstage/src/node_modules/@backstage-community/plugin-rbac-backend/dist/index.cjs.js'
]
}
```

### 👀 Have you spent some time to check if this bug has been raised before?

- [x] I checked and didn't find similar issue

### 🏢 Have you read the Code of Conduct?

- [x] I have read the [Code of Conduct](https://github.com/backstage/community-plugins/blob/main/CODE_OF_CONDUCT.md)

### Are you willing to submit PR?

Yes I am willing to submit a PR!

Reproduce the failure by installing backstage-community/plugin-rbac-backend@7.16.0 in a fresh Backstage app and running yarn start. Trace the missing mongodb import through typeorm-adapter/lib/casbinMongoRule.js and the RBAC backend package, then verify that the backend starts without manually adding mongodb to the backend workspace.

Written by the indexing model from the issue text.