doc: Adds upgrade guide for 1.25.0 release (#2939)

Author: maastha

docs/guides/1.25.0-upgrade-guide.md

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+---
+page_title: "Upgrade Guide 1.25.0"
+---
+
+# MongoDB Atlas Provider 1.25.0: Upgrade and Information Guide
+
+The Terraform MongoDB Atlas Provider version 1.25.0 has a number of new and exciting features.
+
+## New Resources, Data Sources, and Features
+
+- You can now specify the Networking Access Type by using the `mongodbatlas_stream_connection` resource's `networking` attribute when the connection type is `Kafka`. To learn more, see [mongodbatlas_stream_connection](https://registry.terraform.io/providers/mongodb/mongodbatlas/latest/docs/resources/stream_connection) resource documentation.
+- You can now access a list of future inbound and outbound IP addresses associated with the clusters in your Atlas Project by using the `services.#.clusters.#.future_inbound` and `services.#.clusters.#.future_outbound` attributes in the `mongodbatlas_project_ip_addresses` data source. To learn more, see [mongodbatlas_project_ip_addresses](https://registry.terraform.io/providers/mongodb/mongodbatlas/latest/docs/data-sources/project_ip_addresses) data source documentation.
+
+## Deprecations and removals
+
+- `tenant_id` attribute has been deprecated in `mongodbatlas_cloud_backup_snapshot_export_bucket` resource in favor of `mongodbatlas_cloud_provider_access_authorization.azure.tenant_id`.
+
+
+
+## Helpful Links
+
+* [Report bugs](https://github.com/mongodb/terraform-provider-mongodbatlas/issues)
+
+* [Request Features](https://feedback.mongodb.com/forums/924145-atlas?category_id=370723)
+
+* [Contact Support](https://docs.atlas.mongodb.com/support/) covered by MongoDB Atlas support plans, Developer and above.