r/aws_datasync_agent: handle computed private_link_endpoint values

[jar-b]

Description

Prevent persistent diffs on aws_datasync_agent configurations where private_link_endpoint is not explicitly configured but is returned by the AWS API.

Relations

Closes #19947

Output from Acceptance Testing

$ make testacc PKG=datasync TESTS=TestAccDataSyncAgent_
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/datasync/... -v -count 1 -parallel 20 -run='TestAccDataSyncAgent_'  -timeout 180m

--- PASS: TestAccDataSyncAgent_disappears (106.23s)
--- PASS: TestAccDataSyncAgent_basic (111.66s)
--- PASS: TestAccDataSyncAgent_tags (150.82s)
--- PASS: TestAccDataSyncAgent_agentName (172.15s)
--- PASS: TestAccDataSyncAgent_vpcEndpointID (292.41s)
PASS
ok      github.com/hashicorp/terraform-provider-aws/internal/service/datasync   295.587s

[github-actions]

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[johnsonaj]

LGTM 🚀

$ make testacc PKG=datasync TESTS=TestAccDataSyncAgent_
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/datasync/... -v -count 1 -parallel 20 -run='TestAccDataSyncAgent_'  -timeout 180m
--- PASS: TestAccDataSyncAgent_disappears (127.40s)
--- PASS: TestAccDataSyncAgent_basic (130.30s)
--- PASS: TestAccDataSyncAgent_agentName (137.29s)
--- PASS: TestAccDataSyncAgent_tags (166.40s)
--- PASS: TestAccDataSyncAgent_vpcEndpointID (279.25s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/datasync	282.552s

[github-actions]

This functionality has been released in v5.9.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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