Added ForceNew for aws_redshift_cluster on availability_zone change

[Victorion]

Fixes #5757

Changes proposed in this pull request:

• Added "ForceNew: true" for aws_redshift_cluster on availability_zone change
• Added acceptance test: TestAccAWSRedshiftCluster_changeAvailabilityZone
• Added config: testAccAWSRedshiftClusterConfig_updatedAvailabilityZone
• Added simple check: testAccCheckAWSRedshiftClusterAvailabilityZone

Output from acceptance testing:

$ make testacc TEST=./aws TESTARGS='-run=TestAccAWSRedshiftCluster_changeAvailabilityZone'
==> Checking that code complies with gofmt requirements...
TF_ACC=1 go test ./aws -v -run=TestAccAWSRedshiftCluster_changeAvailabilityZone -timeout 120m
=== RUN   TestAccAWSRedshiftCluster_changeAvailabilityZone
--- PASS: TestAccAWSRedshiftCluster_changeAvailabilityZone (2331.72s)
PASS
ok  	github.com/terraform-providers/terraform-provider-aws/aws	2331.736s
...

[bflad]

LGTM, thanks @Victorion! 🚀

(test failure unrelated)

--- PASS: TestAccAWSRedshiftCluster_basic (852.63s)
--- PASS: TestAccAWSRedshiftCluster_tags (882.12s)
--- PASS: TestAccAWSRedshiftCluster_loggingEnabledDeprecated (901.70s)
--- FAIL: TestAccAWSRedshiftCluster_loggingEnabled (906.62s)
--- PASS: TestAccAWSRedshiftCluster_snapshotCopy (988.78s)
--- PASS: TestAccAWSRedshiftCluster_kmsKey (1015.03s)
--- PASS: TestAccAWSRedshiftCluster_publiclyAccessible (1019.34s)
--- PASS: TestAccAWSRedshiftCluster_importBasic (1068.13s)
--- PASS: TestAccAWSRedshiftCluster_enhancedVpcRoutingEnabled (1081.38s)
--- PASS: TestAccAWSRedshiftCluster_iamRoles (1172.05s)
--- PASS: TestAccAWSRedshiftCluster_withFinalSnapshot (1414.80s)
--- PASS: TestAccAWSRedshiftCluster_changeAvailabilityZone (1801.14s)
--- PASS: TestAccAWSRedshiftCluster_forceNewUsername (1840.33s)
--- PASS: TestAccAWSRedshiftCluster_updateNodeType (2877.67s)
--- PASS: TestAccAWSRedshiftCluster_updateNodeCount (3010.42s)

[bflad]

This has been released in version 1.35.0 of the AWS provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thanks!