update fallback for backend id resolvers if stack, app id, or branch are in args

[rtpascual]

Problem

Came from https://github.com/aws-amplify/amplify-backend/pull/2028#discussion_r1768862801.

If stack, app id, or branch are passed in as an argument for generate commands, there is no intention to run these commands against a sandbox.

Issue number, if available:

Changes

Only fallback to resolving sandbox backend identifier if stack, app id, and branch are not passed in as arguments to generate commands.

Corresponding docs PR, if applicable:

Validation

Updated unit test.

Checklist

• [ ] If this PR includes a functional change to the runtime behavior of the code, I have added or updated automated test coverage for this change.
• [ ] If this PR requires a change to the Project Architecture README, I have included that update in this PR.
• [ ] If this PR requires a docs update, I have linked to that docs PR above.
• [ ] If this PR modifies E2E tests, makes changes to resource provisioning, or makes SDK calls, I have run the PR checks with the run-e2e label set.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 249206cc7eb07db147a3b6a6d3a7f5680553195b

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ------------------------ | ----- | | @aws-amplify/backend-cli | Patch |

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