Updating Eventhub as the log analytics destination

[xiaxyi]

If the user specify EventHubs as the destination of the log analytics, we need to use the resource id together with the metadata{eventhub_name}.

Fixing the issue:#17333

ACC TEST:
--- PASS: TestAccLogAnalyticsDataExportRule_toEventhub (512.08s)
PASS
ok      github.com/hashicorp/terraform-provider-azurerm/internal/services/loganalytics  512.724s

(fixes #17333)

[katbyte]

LGTM 🌳

[xiaxyi]

Thanks @katbyte , I resolved the conflicts

[AmudaPalani]

Can you please merge this PR? Waiting for this fix.

[github-actions]

This functionality has been released in v3.17.0 of the Terraform Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

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[github-actions]

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