### Description

`FROM test | eval x1 = pow(emp_no, 1), x2 = pow(x1, 1), x3 = pow(x2, 2)`

or

`FROM test | eval x1 = substring(ip1, 3), x2 = substring(x1, 2), x3 = substring(x2, 2)`

or

`FROM test | eval x1 = concat(ip1, ip2), x2 = concat(x1, "--"), x3 = concat(x2, "**")`

will fail with 

```
                "type": "verification_exception",
                "reason": "Found 1 problem\nline 1:65: Unknown column [x2], did you mean [x1]?"
```

Spawned from https://github.com/elastic/elasticsearch/issues/99472
x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/analysis/AnalyzerTests.java
| drop dep, dep.dep_id.keyword
                """,
            "Found 2 problems\n" + "line 2:8: Unknown column [dep]\n" + "line 2:13: Unknown column [dep.dep_id.keyword]",
            "mapping-multi-field-with-nested.json"
        );
    }
    public void testDropNestedWildcardField() {
        verifyUnsupported("""
            from test
            | drop dep.*
            """, "Found 1 problem\n" + "line 2:8: No match found for [dep.*]", "mapping-multi-field-with-nested.json");
    }
    public void testSupportedDeepHierarchy() {
        assertProjectionWithMapping("""
            from test
            | keep some.dotted.field, some.string.normalized
            """, "mapping-multi-field-with-nested.json", "some.dotted.field", "some.string.normalized");
    }
    public void testDropSupportedDottedField() {
        assertProjectionWithMapping(
            """
                from test
                | drop some.dotted.field
                """,
            "mapping-multi-field-variation.json",
            "bool",
            "date",
            "date_nanos",
            "float",
            "foo_type",