Release new GA version of Azure.Core that uses 1.4.0

[m-nash]

Update azure core and shared source to use the new SCM and analyzer build from #48292

[github-actions]

Hi @m-nash, I'm an AI Support assistant here to help with your issue. While the Azure SDK team reviews your request, I wanted to provide some possible tips and documentation that might help you in the meantime.

• Verify that breaking changes (e.g. removal of AuthenticationRecord, AuthenticationRequiredException, and modifications to credential options) have been thoroughly communicated and documented (see Azure.Identity CHANGELOG).
• Ensure that downstream clients or libraries updated to Azure.Core 1.4.0 have been tested against these breaking changes.
• Confirm that all dependency upgrades (for example, those in other client libraries such as Communication or ResourceManager packages) correctly reference Azure.Core 1.4.0 and are compatible with the GA release.
• Validate that release notes clearly indicate no accidental removals or modifications beyond what is planned, matching the expectations set in the beta versions.

The Azure SDK team will respond to your issue shortly. I hope these suggestions are helpful in the meantime. If this comment helped you, please give it a 👍. If the suggestion was not helpful or incorrect, please give it a 👎. Your feedback helps us improve!