Fix dialect import on SQLAlchemy 1.4

[vgvoleg]

Problem

import ydb_sqlalchemy raises NameError: name 'Any' is not defined under SQLAlchemy 1.4.x, so the dialect cannot be imported at all there (closes #112).

Root cause (verified)

On SQLAlchemy 1.4, @reflection.cache doesn't wrap the method with a closure — it regenerates the method from a source string (util.langhelpers.decorate → format_argspec_plus + exec) and exec's it in a namespace containing only the target/fn0 symbols. The generated source looks like:

def fn(self, connection, schema=None, **kw: Any):
    return target(fn0, self, connection, schema=schema, **kw)

The **kw: Any annotation is copied verbatim and evaluated at definition time, but Any is not in that exec namespace → NameError, raised on class definition (i.e. import).

get_view_names / get_view_definition were the only reflection methods carrying a kwargs annotation; the rest use plain **kw. SQLAlchemy 2.0 reworked the decorator and no longer reproduces annotations, which is why this was invisible on 2.0.

Fix

Drop the : Any annotation from the kwargs of the two @reflection.cache view methods to match the other reflection methods. No behavior change on 2.0.

Verification

• Reproduced the NameError on a clean SQLAlchemy 1.4.54 env with a minimal @reflection.cache + **kw: Any example, and inspected the generated wrapper source to confirm the mechanism.
• After the fix, import ydb_sqlalchemy succeeds on SQLAlchemy 1.4.54.