**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);
```

if (ttl)
    {
        writeChar('\t', buf);
        DB::writeText("TTL ", buf);
        writeEscapedString(queryToString(ttl), buf);
    }
    writeChar('\n', buf);
}
void ColumnDescription::readText(ReadBuffer & buf)
{
    readBackQuotedString(name, buf);
    assertChar(' ', buf);
    String type_string;
    readEscapedString(type_string, buf);
    type = DataTypeFactory::instance().get(type_string);
    if (checkChar('\t', buf))
    {
        String modifiers;
        readEscapedStringUntilEOL(modifiers, buf);
        ParserColumnDeclaration column_parser( true);
        ASTPtr ast = parseQuery(column_parser, "x T " + modifiers, "column parser", 0, DBMS_DEFAULT_MAX_PARSER_DEPTH);
        if (auto * col_ast = ast->as<ASTColumnDeclaration>())
        {
            if (col_ast->default_expression)
            {
                default_desc.kind = columnDefaultKindFromString(col_ast->default_specifier);
                default_desc.expression = std::move(col_ast->default_expression);
            }
            if (col_ast->comment)
                comment = col_ast->comment->as<ASTLiteral &>().value.get<String>();