enhancement(clone): support for snapshot clone

[ujjwal-ibm]

Community Note

• Please vote on this pull request by adding a 👍 reaction to the original pull request comment to help the community and maintainers prioritize this request
• Please do not leave "+1" or other comments that do not add relevant new information or questions, they generate extra noise for pull request followers and do not help prioritize the request

Relates OR Closes #0000

Output from acceptance testing:

=== RUN   TestAccIBMISSnapshotClone_basic
no message sent
no message sent
--- PASS: TestAccIBMISSnapshotClone_basic (389.01s)
PASS
ok      github.com/IBM-Cloud/terraform-provider-ibm/ibm/service/vpc     391.295s

=== RUN   TestAccIBMISSnapshotDatasource_clonesbasic
no message sent
no message sent
--- PASS: TestAccIBMISSnapshotDatasource_clonesbasic (248.47s)
PASS
ok      github.com/IBM-Cloud/terraform-provider-ibm/ibm/service/vpc     250.746s

=== RUN   TestAccIBMISSnapshotsDatasource_clonesbasic
no message sent
no message sent
--- PASS: TestAccIBMISSnapshotsDatasource_clonesbasic (261.59s)
PASS
ok      github.com/IBM-Cloud/terraform-provider-ibm/ibm/service/vpc     263.664s

=== RUN   TestAccIBMISSnapshotCloneDatasource_basic
no message sent
no message sent
--- PASS: TestAccIBMISSnapshotCloneDatasource_basic (236.81s)
PASS
ok      github.com/IBM-Cloud/terraform-provider-ibm/ibm/service/vpc     238.829s

--- PASS: TestAccIBMISSnapshotCloneDatasource_basic (236.81s)
PASS
ok      github.com/IBM-Cloud/terraform-provider-ibm/ibm/service/vpc     238.829s