Update(Cloud-Databases): Added hints for region and location mismatches

[omaraibrahim]

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

╷
│ Error: [ERROR] Error getting database autoscaling groups: Not Found
│  Hint: Check if there is a mismatch between your database location and IBMCLOUD_REGION
│ 
│   with ibm_database.elasticsearch,
│   on main.tf line 105, in resource "ibm_database" "elasticsearch":
│  105: resource "ibm_database" "elasticsearch" {
│ 
╵

Output from acceptance testing:

$ make testacc TESTARGS='-run=TestAccXXX'

...

[lornakelly]

LGTM