fix(objectStorage): Fix invalid key format

[Geun-Oh]

• Fixed object key parser since it did not get the value with multiple "/".

• Fixed object key regex format with the same issue above.

• Set endpoint with fixed value in financial environment (region "FKR" does not fit with it).

• Add test code for update logic

• Add Content-Type property update logic & tests at object, object_copy

[Geun-Oh]

=== RUN TestAccResourceNcloudObjectStorage_bucket_acl_basic
--- PASS: TestAccResourceNcloudObjectStorage_bucket_acl_basic (17.72s)
=== RUN TestAccResourceNcloudObjectStorage_bucket_acl_update
--- PASS: TestAccResourceNcloudObjectStorage_bucket_acl_update (24.75s)
=== RUN TestAccDataSourceNcloudObjectStorage_bucket_basic
--- PASS: TestAccDataSourceNcloudObjectStorage_bucket_basic (12.87s)
=== RUN TestAccResourceNcloudObjectStorage_bucket_basic
--- PASS: TestAccResourceNcloudObjectStorage_bucket_basic (12.11s)
=== RUN TestAccResourceNcloudObjectStorage_object_acl_basic
--- PASS: TestAccResourceNcloudObjectStorage_object_acl_basic (29.71s)
=== RUN TestAccResourceNcloudObjectStorage_object_acl_update
--- PASS: TestAccResourceNcloudObjectStorage_object_acl_update (35.59s)
=== RUN TestAccResourceNcloudObjectStorage_object_copy_basic
--- PASS: TestAccResourceNcloudObjectStorage_object_copy_basic (33.41s)
=== RUN TestAccDataSourceNcloudObjectStorage_object_basic
--- PASS: TestAccDataSourceNcloudObjectStorage_object_basic (22.95s)
=== RUN TestAccResourceNcloudObjectStorage_object_basic
--- PASS: TestAccResourceNcloudObjectStorage_object_basic (22.92s)
=== RUN TestAccResourceNcloudObjectStorage_object_update
--- PASS: TestAccResourceNcloudObjectStorage_object_update (35.25s)
PASS
ok github.com/terraform-providers/terraform-provider-ncloud/internal/service/objectstorage 248.016s

---

Testings in all region / network was succeeded.

[Geun-Oh]

@wonchulee 관련하여 작업 진행하고, 테스트 확인하였습니다.

endpoint의 경우 추후 별도 PR로 올려두겠습니다.

[Geun-Oh]

@wonchulee GetObject를 source 비교 조건문 내 else 처리로 진행하도록 하여 body를 추가하는 작업을 통일하고,

이외의 property를 모두 뒤로 빼어 명확하게 해두었습니다.

[wonchulee]

👍 수고하셨습니다!