[Issue 23828] New: Deprecation warnings on deprecated variables with deprecated types

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23828

          Issue ID: 23828
           Summary: Deprecation warnings on deprecated variables with
                    deprecated types
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Keywords: rejects-valid
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: elpenguino+D at gmail.com

This code currently (as of DMD 2.103.0) produces two deprecation warnings,
instead of zero:
```
deprecated struct Foo {}
deprecated Foo foo;
```
Declaring a variable of type Foo within other contexts, such as deprecated
functions or other deprecated aggregate types, produces an expected zero
warnings.

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