fix(api): disambiguate attribute errors from a missing resolve method

Previously we caught `AttributeError`s to consider values that aren't
`Deferred` instances as resolved.

However, we caught the `AttributeError` during resolution of the
`resolve` attribute _and_ resolution of the deferred value against an
object.

This commit scopes that to only the `resolve` attribute, other errors
are bubbled up as usual.

ibis/expr/deferred.py

@@ -137,7 +137,6 @@ def __neg__(self) -> Deferred:
 
 
 def _resolve(arg: Any, *, expr: ir.Expr) -> Any:
-    try:
-        return arg.resolve(expr)
-    except AttributeError:
-        return arg
+    if (func := getattr(arg, "resolve", None)) is not None:
+        return func(expr)
+    return arg

ibis/expr/tests/test_deferred.py

@@ -0,0 +1,12 @@
+import pytest
+
+import ibis
+
+
+def test_invalid_attribute():
+    from ibis import _
+
+    t = ibis.table(dict(a="int"), name="t")
+    d = _.a + _.b
+    with pytest.raises(AttributeError):
+        d.resolve(t)