**Describe what's wrong**

Creating a table with a Map-type Ephemeral column will make the server crash on the restart because of wrongly save metadata.

Fiddle to reproduce: https://fiddle.clickhouse.com/81fc3a83-f7ea-43c2-afad-2e2940d04e8c

**Does it reproduce on recent release?**

Tested on version 22.11.1.1286.

**How to reproduce**

* Use version 22.11.x
* Use the fiddle above to reproduce.

**Expected behavior**

When creating a `EPHEMERAL` columns, a default value is assigned.
Example with a Int32:
```sql
CREATE TABLE name (
  example_col Int32 EPHEMERAL
) -- ... engine stuff here ...
```

Metadata will assign a default value:
```sql
CREATE TABLE name (
  example_col Int32 EPHEMERAL 0
) -- ... engine stuff here ...
```

But, with Map-type, no default value gets assigned, only a `()` (empty parenthesis).

**Error message and/or stacktrace**

```
2022.12.07 14:59:29.359153 [ 11464597 ] {} <Error> Application: DB::Exception: Syntax error (in file /Users/vlourme/Desktop/ch/store/75e/75e717de-1bbd-4011-802c-acd04e9a3409/bug_ephemeral.sql): failed at position 118 ('(') (line 4, col 41): (),
    `result` Int32 DEFAULT (data['number']) * 2
)
ENGINE = MergeTree
ORDER BY id
SETTINGS index_granularity = 8192
. Expected one of: literal, NULL, number, Bool, true, false, string literal, NOT, COMMENT, CODEC, TTL, token, Comma, ClosingRoundBracket: Cannot parse definition from metadata file /Users/vlourme/Desktop/ch/store/75e/75e717de-1bbd-4011-802c-acd04e9a3409/bug_ephemeral.sql
```

**Additional context**

The issue can't be fixed by setting a default expression after `EPHEMERAL`, this, for example will not work:
```sql
CREATE TABLE bug_ephemeral (
    id Int32,
    data Map(String, Int32) EPHEMERAL {},
    result Int DEFAULT data['number'] * 2
)
Engine = MergeTree()
ORDER BY (id);
```

But this, is accepted:
```sql
CREATE TABLE bug_ephemeral (
    id Int32,
    data Int32 EPHEMERAL 12,
    result Int DEFAULT data * 2
)
Engine = MergeTree()
ORDER BY (id);
```

assert(!create.is_dictionary);
        if (create.columns_list->columns)
        {
            properties.columns = getColumnsDescription(*create.columns_list->columns, getContext(), create.attach);
        }
        if (create.columns_list->indices)
            for (const auto & index : create.columns_list->indices->children)
            {
                properties.indices.push_back(
                    IndexDescription::getIndexFromAST(index->clone(), properties.columns, getContext()));
                    if (properties.indices.back().type == "annoy" && !getContext()->getSettingsRef().allow_experimental_annoy_index)
                        throw Exception("Annoy index is disabled. Turn on allow_experimental_annoy_index", ErrorCodes::INCORRECT_QUERY);
            }
        if (create.columns_list->projections)
            for (const auto & projection_ast : create.columns_list->projections->children)
            {
                auto projection = ProjectionDescription::getProjectionFromAST(projection_ast, properties.columns, getContext());
                properties.projections.add(std::move(projection));
            }
        properties.constraints = getConstraintsDescription(create.columns_list->constraints);
    }
    else if (!create.as_table.empty())
    {
        String as_database_name = getContext()->resolveDatabase(create.as_database);
        StoragePtr as_storage = DatabaseCatalog::instance().getTable({as_database_name, create.as_table}, getContext());
        
        as_storage_lock = as_storage->lockForShare(getContext()->getCurrentQueryId(), getContext()->getSettingsRef().lock_acquire_timeout);
        auto as_storage_metadata = as_storage->getInMemoryMetadataPtr();
        properties.columns = as_storage_metadata->getColumns();