fix: match layer names ending with a digit in ignore_layers

[kwy404]

Description

Root cause: _resolve_layer_config_presets appends a "." to every ignore_layers entry that ends with a digit, so that layers.1 does not also match layers.10. Layer names can end with a digit too, for example fc1 / fc2 in OPT and Phi, or a full name such as model.decoder.layers.0.fc1. Those entries become fc1. / model.decoder.layers.0.fc1., match no layer, and the layers are quantized anyway. The only hint is the warning "Layer name or regex 'fc1.' in layer_config does not match any supported layers". Full names like model.decoder.layers.0.fc1 worked before #1553, which moved the suffix ahead of the exact name check.

Fix: only append the "." when some module actually sits under that name (name + "." occurs in a module name). Block names such as layers.1 keep the current behavior, and a layer whose own name ends with a digit is matched like any other name.

Test: test_layer_name_ending_with_digit in test/unit/common/utils/test_set_layer_config.py passes ignore_layers="fc1,layers.0.fc2" on the existing 12 block test model.

• Before the fix: fails with assert 4 == 16 for layers.11.fc1, and the warning above is logged for fc1. and layers.0.fc2..
• After the fix: the whole file passes (5 passed) with no warning.

Type of Change

Bug fix

Related Issues

Follow up to #1553

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• Documentation has been updated as needed.
• New or updated tests are included where applicable.
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