mediaconvert: Use standard Regional endpoints, not per-account endpoints

[ewbankkit]

Description

Also migrates to AWS SDK for Go v2.

Relations

Closes #35608.
Relates #32976.

Output from Acceptance Testing

% make testacc TESTARGS='-run=TestAccMediaConvert' PKG=mediaconvert ACCTEST_PARALLELISM=2
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./internal/service/mediaconvert/... -v -count 1 -parallel 2  -run=TestAccMediaConvert -timeout 360m
=== RUN   TestAccMediaConvertQueueDataSource_basic
=== PAUSE TestAccMediaConvertQueueDataSource_basic
=== RUN   TestAccMediaConvertQueue_basic
=== PAUSE TestAccMediaConvertQueue_basic
=== RUN   TestAccMediaConvertQueue_disappears
=== PAUSE TestAccMediaConvertQueue_disappears
=== RUN   TestAccMediaConvertQueue_withTags
=== PAUSE TestAccMediaConvertQueue_withTags
=== RUN   TestAccMediaConvertQueue_reservationPlanSettings
    acctest.go:93: MediaConvert Reserved Queues are $400/month and cannot be deleted for 1 year.
--- SKIP: TestAccMediaConvertQueue_reservationPlanSettings (0.00s)
=== RUN   TestAccMediaConvertQueue_withStatus
=== PAUSE TestAccMediaConvertQueue_withStatus
=== RUN   TestAccMediaConvertQueue_withDescription
=== PAUSE TestAccMediaConvertQueue_withDescription
=== CONT  TestAccMediaConvertQueueDataSource_basic
=== CONT  TestAccMediaConvertQueue_withTags
--- PASS: TestAccMediaConvertQueueDataSource_basic (18.00s)
=== CONT  TestAccMediaConvertQueue_disappears
--- PASS: TestAccMediaConvertQueue_disappears (21.01s)
=== CONT  TestAccMediaConvertQueue_basic
--- PASS: TestAccMediaConvertQueue_withTags (51.68s)
=== CONT  TestAccMediaConvertQueue_withDescription
--- PASS: TestAccMediaConvertQueue_basic (22.74s)
=== CONT  TestAccMediaConvertQueue_withStatus
--- PASS: TestAccMediaConvertQueue_withDescription (30.87s)
--- PASS: TestAccMediaConvertQueue_withStatus (31.89s)
PASS
ok  	github.com/hashicorp/terraform-provider-aws/internal/service/mediaconvert	104.885s

[github-actions]

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[github-actions]

This functionality has been released in v5.36.0 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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