ASSETS-62882 Update test to allow and match dynamic IDs

[cmrockwell]

Update asset upload Cypress test for dynamic rename input IDs

https://jira.corp.adobe.com/browse/ASSETS-62882

Description

The asset upload rename input in fileupload.js now appends index to create unique IDs (e.g. dam-asset-upload-rename-input-{idx}) if multiple files are uploaded. The first will be static ID dam-asset-upload-rename-input.

This PR updates the Cypress test in assets.cy.js to target the rename input with an attribute selector that works for both the old static ID and the new unique IDs.

Related Issue

ASSETS-62882

Motivation and Context

The upload UI now assigns a unique ID per rename input to avoid ID collisions when multiple uploads or dialogs are in use. The test previously used input#dam-asset-upload-rename-input, which fails when the ID is dynamic. Using input[id^="dam-asset-upload-rename-input"] keeps the test passing for both the legacy static ID and the new unique IDs, so the test stays compatible with current and older AEM Assets behavior.

How Has This Been Tested?

• This change to E2E requires testing against cloud AEM CS environments
• Cannot be tested against local AEM SDK jar because the assets.cy.js looks for /content/dam.completeUpload.json which will only be requested when using Asset Binary Cloud Storage
• Changes to the E2E test are needed to complete https://git.corp.adobe.com/CQ/dam/pull/13254/files

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.