fix(amplify-provider-awscloudformation): Ensure the right profile is …

…used with SSO and with credential_process

Make sure the right profile is used when using credential_process

When using credential_process in the AWS profile (to get SSO to work for example) the ProcessCredentials Provider is used.
When using the default chain from the aws-sdk no options are passed to it and it default to using AWS_PROFILE.

With this change, we detect ```credential_process``` and specifically pass the profile name into the credential chain to ensure it gets
used.

re aws-amplify#4488

packages/amplify-provider-awscloudformation/src/system-config-manager.ts

@@ -79,6 +79,14 @@ export async function getProfiledAwsConfig(context: $TSContext, profileName: str
         ...profileConfig,
         ...roleCredentials,
       };
+
+      if (profileConfig.credential_process) {
+        const chain = new aws.CredentialProviderChain();
+        const processProvider = () => new aws.ProcessCredentials({ profile: profileName });
+        chain.providers.push(processProvider);
+
+        awsConfigInfo.credentialProvider = chain;
+      }
     } else {
       logger('getProfiledAwsConfig.getProfileCredentials', [profileName]);
       const profileCredentials = getProfileCredentials(profileName);