`azurerm_machine_learning_compute_cluster` - fix scaling settings and tags to update in-place instead of recreate

[ezhong-msft]

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Description

machine_learning_compute_cluster currently recreates the resource when scaling settings and/or tags are updated. This seems to be a workaround since at the time of implementation there was a bug that prevented it from being updated in place. It seems to have since been fixed with the new sdk version so the ForceNew can be removed from these properties. See https://github.com/hashicorp/terraform-provider-azurerm/pull/11675

PR Checklist

• [x] I have followed the guidelines in our Contributing Documentation.
• [x] I have checked to ensure there aren't other open Pull Requests for the same update/change.
• [x] I have checked if my changes close any open issues. If so please include appropriate closing keywords below.
• [x] I have updated/added Documentation as required written in a helpful and kind way to assist users that may be unfamiliar with the resource / data source.
• [x] I have used a meaningful PR title to help maintainers and other users understand this change and help prevent duplicate work. For example: “resource_name_here - description of change e.g. adding property new_property_name_here”

Changes to existing Resource / Data Source

• [x] I have added an explanation of what my changes do and why I'd like you to include them (This may be covered by linking to an issue above, but may benefit from additional explanation).
• [x] I have written new tests for my resource or datasource changes & updated any relevant documentation.
• [x] I have successfully run tests with my changes locally. If not, please provide details on testing challenges that prevented you running the tests.

Testing

• [x] My submission includes Test coverage as described in the Contribution Guide and the tests pass. (if this is not possible for any reason, please include details of why you did or could not add test coverage)

Change Log

Below please provide what should go into the changelog (if anything) conforming to the Changelog Format documented here.

• azurerm_machine_learning_compute_cluster - fix scaling settings and tags to update in-place instead of recreate [GH-29859]

This is a (please select all that apply):

• [x] Bug Fix
• [ ] New Feature (ie adding a service, resource, or data source)
• [ ] Enhancement
• [ ] Breaking Change

Related Issue(s)

Fixes #29859

Rollback Plan

If a change needs to be reverted, we will publish an updated version of the provider.

Changes to Security Controls

Are there any changes to security controls (access controls, encryption, logging) in this pull request? If so, explain.

n/a

[!NOTE] If this PR changes meaningfully during the course of review please update the title and description as required.