Microsoft.Migrate: The properties "tags" and "identity" does not exist in the resource or type definition

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### Resource Type

Microsoft.Migrate/migrateProjects

### Api Version

2020-05-01

### Issue Type

Type is unavailable

### Other Notes

```
C:\repos\azure-migrate\bicep\main.bicep(158,3) : Warning BCP187: The property "tags" does not exist in the resource or type definition, although it might still be valid. If this is a resource type definition inaccuracy, report it using https://aka.ms/bicep-type-issues. [https://aka.ms/bicep/core-diagnostics#BCP187]
C:\repos\azure-migrate\bicep\main.bicep(159,3) : Warning BCP187: The property "identity" does not exist in the resource or type definition, although it might still be valid. If this is a resource type definition inaccuracy, report it using https://aka.ms/bicep-type-issues. [https://aka.ms/bicep/core-diagnostics#BCP187]
```

### Bicep Repro

```bicep
resource migrateProject 'Microsoft.Migrate/migrateProjects@2020-05-01' = {
name: migrateProjectName
location: location
tags: migrateTags
identity: {
type: 'SystemAssigned'
}
properties: {
publicNetworkAccess: 'Enabled'
}
}
```

Note: https://github.com/Azure/bicep-types-az/issues/2685 mentions the `tags `property

### Confirm

- [x] I have read the troubleshooting guide and looked for duplicates.

Start with the type definition for Microsoft.Migrate/migrateProjects@2020-05-01 and compare it with the Bicep repro in the issue, focusing on the tags and identity properties. Confirm the result by checking that the reported BCP187 warnings no longer appear for the supplied resource definition.

Written by the indexing model from the issue text.