Support resolve extension name in upcoming breaking change collection

[ReaNAiveD]

Related command

azdev generate-breaking-change-report

Description

Previously, upcoming breaking changes weren’t detected when using extension names like redisenterprise instead of the expected azext_redisenterprise.
This update resolves the issue by using get_name_index to correctly map and support both naming formats.

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This checklist is used to make sure that common guidelines for a pull request are followed.

• pylint azdev --rcfile=.pylintrc -r n

• flake8 --statistics --append-config=.flake8 azdev

[azure-client-tools-bot-prd]

Hi @ReaNAiveD,
Please write the description of change into HISTORY.rst.
If you want to release a new azdev version, please update the VERSION in init.py as well.

[Copilot]

Pull Request Overview

Adds support for resolving upcoming breaking changes when users specify extension short names (e.g., redisenterprise) instead of module names (e.g., azext_redisenterprise) by introducing a name index lookup.

• Import get_name_index and build a name_index during collection
• Map extension identifiers through name_index before processing breaking changes

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