Fix Shared ADF Lambda Layer builds and add move to ARM-64 Lambdas

**Why?**

The Lambda Layer that ADF builds included the `bootstrap/adf-build/shared`
folder as its source.

Unfortunately, this resulted in 388 MB of unzipped dependencies.
While the maximum limit for AWS Lambda Layers is set at 250 MB.

**What?**

After going through each of the lambda functions that use this Lambda Layer,
I realized that they only require the files located in
`bootstrap/adf-build/shared/python`.

Since this implied no longer requiring AWS CDK in the Lambda Layer, I also
used this opportunity to move to the ARM-64 Lambdas in ADF.

The new Lambda Layer is 26 MB.

To build ARM-64 on CodeBuild, I've added the Amazon managed container that
enables cross-architecture builds on Docker. That will launch and
configure Qemu correctly, so ARM-64 Docker images can execute correctly.
I've also fixed the build metadata and updated the `sam build` process to
use a container instead. As without it, it could not resolve the dependencies
required for PyYaml and others specifically for ARM-64.

Lastly, I've updated the shared lambda layer permissions, so we have
control in the stack who can access and build on top of it.

Author: sbkok

linters/custom-adf-dict.txt

@@ -4,6 +4,7 @@ adf
 adfconfig
 awscli
 backoff
+binfmt
 bitnami
 boto
 boto3

src/lambda_codebase/account_bootstrap.py

@@ -9,20 +9,22 @@
 """
 
 import os
-import boto3
 
+import boto3
 from botocore.exceptions import ClientError
-from logger import configure_logger
+
+# ADF imports
 from errors import (
     AccountCreationNotFinishedError,
     GenericAccountConfigureError,
     ParameterNotFoundError,
 )
-from parameter_store import ParameterStore
 from cloudformation import CloudFormation
+from logger import configure_logger
+from parameter_store import ParameterStore
+from partition import get_partition
 from s3 import S3
 from sts import STS
-from partition import get_partition
 
 # Globals taken from the lambda environment variables
 S3_BUCKET = os.environ["S3_BUCKET_NAME"]

src/lambda_codebase/account_processing/configure_account_alias.py

@@ -6,9 +6,12 @@
 """
 
 import os
-from sts import STS
+
 from aws_xray_sdk.core import patch_all
+
+# ADF imports
 from logger import configure_logger
+from sts import STS
 
 patch_all()
 

src/lambda_codebase/account_processing/configure_account_ou.py

@@ -4,10 +4,12 @@
 """
 Moves an account to the specified OU.
 """
-from organizations import Organizations
 import boto3
 from aws_xray_sdk.core import patch_all
+
+# ADF imports
 from logger import configure_logger
+from organizations import Organizations
 
 
 patch_all()

src/lambda_codebase/account_processing/configure_account_regions.py

@@ -6,9 +6,10 @@
 """
 from ast import literal_eval
 
-
 import boto3
 from aws_xray_sdk.core import patch_all
+
+# ADF imports
 from logger import configure_logger
 
 patch_all()

src/lambda_codebase/account_processing/configure_account_tags.py

@@ -9,6 +9,8 @@
 """
 import boto3
 from aws_xray_sdk.core import patch_all
+
+# ADF imports
 from logger import configure_logger
 
 patch_all()

src/lambda_codebase/account_processing/create_account.py

@@ -8,6 +8,8 @@
 import os
 from aws_xray_sdk.core import patch_all
 import boto3
+
+# ADF imports
 from logger import configure_logger
 
 patch_all()

src/lambda_codebase/account_processing/delete_default_vpc.py

@@ -5,9 +5,11 @@
 Deletes the default VPC in a particular region
 """
 import os
-from sts import STS
 from aws_xray_sdk.core import patch_all
+
+# ADF imports
 from logger import configure_logger
+from sts import STS
 
 patch_all()
 

src/lambda_codebase/account_processing/get_account_regions.py

@@ -6,9 +6,11 @@
 """
 
 import os
-from sts import STS
 from aws_xray_sdk.core import patch_all
+
+# ADF imports
 from logger import configure_logger
+from sts import STS
 
 patch_all()
 

src/lambda_codebase/account_processing/process_account_files.py

@@ -13,15 +13,17 @@
 import logging
 from typing import Any, TypedDict
 import re
-import yaml
 
+import yaml
 from yaml.error import YAMLError
 
 import boto3
 from botocore.exceptions import ClientError
 from aws_xray_sdk.core import patch_all
-from organizations import Organizations
+
+# ADF imports
 from logger import configure_logger
+from organizations import Organizations
 
 
 patch_all()