Add linter to standardize golang import order

[tevesz]

The gci linter is added to the default linter list. The make fix command if run manually can fix the import problems in the project.

[github-actions]

Go test coverage: 33.6% for commit d97db57

⚠️ 2 of 14 packages have zero coverage.

• github.com/cloudera/terraform-provider-cdp/resources/de
• github.com/cloudera/terraform-provider-cdp/resources/ml

View coverage for all packages

# Package Name                                                                  | Coverage
+ github.com/cloudera/terraform-provider-cdp/cdpacctest                         |    26.9%
+ github.com/cloudera/terraform-provider-cdp/provider                           |    78.7%
+ github.com/cloudera/terraform-provider-cdp/resources/datahub                  |    36.3%
+ github.com/cloudera/terraform-provider-cdp/resources/datalake                 |     8.4%
- github.com/cloudera/terraform-provider-cdp/resources/de                       |     0.0%
+ github.com/cloudera/terraform-provider-cdp/resources/dw/cluster/aws           |    72.4%
+ github.com/cloudera/terraform-provider-cdp/resources/dw/databasecatalog       |    66.7%
+ github.com/cloudera/terraform-provider-cdp/resources/dw/virtualwarehouse/hive |    74.3%
+ github.com/cloudera/terraform-provider-cdp/resources/environments             |    44.1%
+ github.com/cloudera/terraform-provider-cdp/resources/iam                      |     2.8%
- github.com/cloudera/terraform-provider-cdp/resources/ml                       |     0.0%
+ github.com/cloudera/terraform-provider-cdp/resources/opdb                     |    25.3%
+ github.com/cloudera/terraform-provider-cdp/utils                              |    55.3%
+ github.com/cloudera/terraform-provider-cdp/utils/test                         |    68.8%

[vcsomor]

❤️