Remove /sdk/resourcemanagerhybrid

[alzimmermsft]

Description

/sdk/resourcemanagerhybrid hasn't had active development in over 3 years and requires conditional logic to exclude in a handful of script. This PR removes the source code as it is very out of date, if it is ever needed again this PR can be reverted.

All SDK Contribution checklist:

• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.

General Guidelines and Best Practices

• Title of the pull request is clear and informative.
• There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, see this page.

Testing Guidelines

• Pull request includes test coverage for the included changes.

[Copilot]

Pull request overview

This PR removes the outdated /sdk/resourcemanagerhybrid directory, which has not had active development in over 3 years and requires special conditional logic in several scripts to exclude it from processing.

Changes:

• Removed the entire /sdk/resourcemanagerhybrid directory containing legacy code
• Updated build scripts to remove conditional exclusions for the resourcemanagerhybrid directory

Reviewed changes

Copilot reviewed 80 out of 4115 changed files in this pull request and generated no comments.

File	Description
sdk/resourcemanagerhybrid/azure-resourcemanager-appservice/src/main/java/com/azure/resourcemanager/appservice/fluent/models/*.java	Removed all fluent model Java classes from the resourcemanagerhybrid appservice package
sdk/resourcemanagerhybrid/azure-resourcemanager-appservice/CHANGELOG.md	Removed changelog file for the hybrid resource manager appservice package
eng/versioning/pom_file_version_scanner.ps1	Removed conditional logic that excluded resourcemanagerhybrid from version scanning