BootstrapDetectionError: Unable to detect CDK bootstrap stack due to permission issues. On backend build Unable to deploy monorepo.

### Environment information

```plain text
System:
OS: macOS 15.1
CPU: (11) arm64 Apple M3 Pro
Memory: 111.02 MB / 18.00 GB
Shell: /bin/zsh
Binaries:
Node: 22.11.0 - ~/Library/pnpm/node
Yarn: undefined - undefined
npm: 10.9.0 - ~/Library/pnpm/npm
pnpm: 9.12.3 - ~/Library/pnpm/pnpm
NPM Packages:
@aws-amplify/auth-construct: Not Found
@aws-amplify/backend: 1.7.0
@aws-amplify/backend-auth: Not Found
@aws-amplify/backend-cli: 1.4.2
@aws-amplify/backend-data: Not Found
@aws-amplify/backend-deployer: Not Found
@aws-amplify/backend-function: Not Found
@aws-amplify/backend-output-schemas: Not Found
@aws-amplify/backend-output-storage: Not Found
@aws-amplify/backend-secret: Not Found
@aws-amplify/backend-storage: Not Found
@aws-amplify/cli-core: Not Found
@aws-amplify/client-config: Not Found
@aws-amplify/deployed-backend-client: Not Found
@aws-amplify/form-generator: Not Found
@aws-amplify/model-generator: Not Found
@aws-amplify/platform-core: Not Found
@aws-amplify/plugin-types: Not Found
@aws-amplify/sandbox: Not Found
@aws-amplify/schema-generator: Not Found
aws-amplify: 6.8.0
aws-cdk: 2.166.0
aws-cdk-lib: 2.166.0
typescript: 5.5.4
AWS environment variables:
AWS_STS_REGIONAL_ENDPOINTS = regional
AWS_NODEJS_CONNECTION_REUSE_ENABLED = 1
AWS_SDK_LOAD_CONFIG = 1
No CDK environment variables
```

### Describe the bug

I've been trying to setup a custom repository for a monorepo that will have several apps hosted on it.

The objective is to be able to share the backend with multple web and mobile apps.

I cant seem to be able to build the backend.

I get the following error within the console when attempting to build it.

[BUILD.txt](https://github.com/user-attachments/files/17723633/BUILD.txt)

this is the current repo

https://github.com/KinuQ/kinuqmono

Im honestly not sure what is it that I'm doing wrong.

I had another single repo app with a full fledged backend, and it is able to just go ahead and get deployed without an issue.

this is my amplify.yml for the CI process
```
version: 1
backend:
phases:
preBuild:
commands:
- corepack enable
- pnpm install
build:
commands:
- echo $AWS_BRANCH
- echo $AWS_APP_ID
- pwd
- cd packages/amplify
- pwd
- pnpm exec ampx pipeline-deploy --branch $AWS_BRANCH --app-id $AWS_APP_ID
- cd ...

frontend:
phases:
build:
commands:
- pnpm turbo build
artifacts:
baseDirectory: apps/placeholderapp/dist
files:
- "**/*"
cache:
paths:
- node_modules/**/*
```

### Reproduction steps

fork my repo,

attempt to deploy on aws.

Start with the linked repository's amplify.yml and the BUILD.txt attachment, then inspect the packages/amplify entry point and the `pnpm exec ampx pipeline-deploy --branch $AWS_BRANCH --app-id $AWS_APP_ID` command. Reproduce the deployment using the listed environment and permissions; done means the monorepo backend deploys without BootstrapDetectionError.

Written by the indexing model from the issue text.