Add greengrass resource

[jmettes]

Added reviewer changes as requested in hashicorp#10881. Removed redundant field resource_definition_version, and added resource version acceptance tests.

make testacc TEST=./aws TESTARGS='-run=TestAccAWSGreengrassResourceDefinition_'                                                                             ==> Checking that code complies with gofmt requirements...                                          
TF_ACC=1 go test ./aws -v -count 1 -parallel 20 -run=TestAccAWSGreengrassResourceDefinition_ -timeout 120m
=== RUN   TestAccAWSGreengrassResourceDefinition_basic
=== PAUSE TestAccAWSGreengrassResourceDefinition_basic
=== RUN   TestAccAWSGreengrassResourceDefinition_versionNoop
=== PAUSE TestAccAWSGreengrassResourceDefinition_versionNoop
=== RUN   TestAccAWSGreengrassResourceDefinition_versionDiff
=== PAUSE TestAccAWSGreengrassResourceDefinition_versionDiff
=== RUN   TestAccAWSGreengrassResourceDefinition_LocalDevice
=== PAUSE TestAccAWSGreengrassResourceDefinition_LocalDevice
=== RUN   TestAccAWSGreengrassResourceDefinition_LocalVolume
=== PAUSE TestAccAWSGreengrassResourceDefinition_LocalVolume
=== RUN   TestAccAWSGreengrassResourceDefinition_S3MachineLearningModel
=== PAUSE TestAccAWSGreengrassResourceDefinition_S3MachineLearningModel
=== RUN   TestAccAWSGreengrassResourceDefinition_SagemakerMachineLearningModel
=== PAUSE TestAccAWSGreengrassResourceDefinition_SagemakerMachineLearningModel
=== RUN   TestAccAWSGreengrassResourceDefinition_SecretsManagerSecret
=== PAUSE TestAccAWSGreengrassResourceDefinition_SecretsManagerSecret
=== CONT  TestAccAWSGreengrassResourceDefinition_basic
=== CONT  TestAccAWSGreengrassResourceDefinition_S3MachineLearningModel
=== CONT  TestAccAWSGreengrassResourceDefinition_SecretsManagerSecret
=== CONT  TestAccAWSGreengrassResourceDefinition_SagemakerMachineLearningModel
=== CONT  TestAccAWSGreengrassResourceDefinition_LocalDevice
=== CONT  TestAccAWSGreengrassResourceDefinition_LocalVolume
=== CONT  TestAccAWSGreengrassResourceDefinition_versionDiff
=== CONT  TestAccAWSGreengrassResourceDefinition_versionNoop
--- PASS: TestAccAWSGreengrassResourceDefinition_basic (53.08s)
--- PASS: TestAccAWSGreengrassResourceDefinition_SecretsManagerSecret (54.53s)
--- PASS: TestAccAWSGreengrassResourceDefinition_S3MachineLearningModel (54.71s)
--- PASS: TestAccAWSGreengrassResourceDefinition_LocalDevice (54.71s)
--- PASS: TestAccAWSGreengrassResourceDefinition_LocalVolume (55.28s)
--- PASS: TestAccAWSGreengrassResourceDefinition_SagemakerMachineLearningModel (58.04s)
--- PASS: TestAccAWSGreengrassResourceDefinition_versionNoop (86.42s)
--- PASS: TestAccAWSGreengrassResourceDefinition_versionDiff (86.64s)
PASS
ok  	github.com/terraform-providers/terraform-provider-aws/aws	86.688s