resource/aws_cloudfront_distribution: Import into ordered_cache_behavior instead of deprecated cache_behavior

[bflad]

Fixes: #5580
Fixes: #4773

Previously:

--- FAIL: TestAccAWSCloudFrontDistribution_orderedCacheBehavior (739.56s)
	testing.go:527: Step 1 error: ImportStateVerify attributes not equivalent. Difference is shown below. Top is actual, bottom is expected.

		(map[string]string) (len=59) {
		 (string) (len=16) "cache_behavior.#": (string) (len=1) "2",
...
		 (string) (len=48) "cache_behavior.1203603591.viewer_protocol_policy": (string) (len=9) "allow-all"
		}

		(map[string]string) (len=59) {
		 (string) (len=24) "ordered_cache_behavior.#": (string) (len=1) "2",
...
		 (string) (len=47) "ordered_cache_behavior.1.viewer_protocol_policy": (string) (len=9) "allow-all"
		}

Changes proposed in this pull request:

• Use d.GetOk() against the old attribute during read instead of the new attribute, which defaults imports to the new attribute

Output from acceptance testing:

--- PASS: TestAccAWSCloudFrontDistribution_orderedCacheBehavior (820.16s)

[tombuildsstuff]

LGTM 👍

[bflad]

This has been released in version 1.33.0 of the AWS provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

[ghost]

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