Fix duplicate index name. (unitycatalog#492)

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- [ ] A description of the changes is added to the description of this
PR.
- [ ] If there is a related issue, make sure it is linked to this PR.
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**Description of changes**

Database index names apparently need to be unique. The same name
`IDX_NAME` was used in multiple locations.

Related Issue unitycatalog#493

Co-authored-by: Vikrant Puppala <[email protected]>

Author: creechy

server/src/main/java/io/unitycatalog/server/persist/dao/RegisteredModelInfoDAO.java

@@ -12,7 +12,7 @@
 @Table(
     name = "uc_registered_models",
     indexes = {
-      @Index(name = "idx_name", columnList = "name"),
+      @Index(name = "uc_registered_models_name_idx", columnList = "name"),
     })
 // Lombok annotations
 @Getter