feat!: cost_management_config is out of beta now

[zmaupin]

move the config outside the logic of beta only

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[bharathkkb]

Thanks for the PR @zmaupin
Looks like this was moved to GA in 4.42. Could you bump the min provider versions in https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/blob/master/autogen/main/versions.tf.tmpl
and also update the upgrade guide https://github.com/terraform-google-modules/terraform-google-kubernetes-engine/blob/master/docs/upgrading_to_v24.0.md#minimum-google-provider-versions to include this in the latest breaking release #1447

[zmaupin]

@bharathkkb Thanks for looking! I have updated the two files you asked me to change.

[comment-bot-dev]

@zmaupin
Thanks for the PR! 🚀
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