fix: resolve Semantic Kernel tool call names

[meaqua9420]

Why are these changes needed?

Semantic Kernel / Bedrock can return tool calls with the AutoGen tool plugin prefix or with hyphenated function names, for example autogen-tools_get_weather or get-weather. AutoGen workbenches register the original tool names, such as get_weather, so those calls fail exact-name lookup even though the requested tool exists.

This changes SKChatCompletionAdapter to resolve returned function-call names against the tools passed to the request. Exact matches still win first; then the adapter handles the AutoGen-managed plugin prefix and hyphen/underscore normalization only when it maps unambiguously to a registered tool. Calls from external kernel plugins keep the existing plugin-function name when there is no matching AutoGen tool.

Related issue number

Fixes #5439

Checks

• I have included any doc changes needed for https://microsoft.github.io/autogen/.
• I have added tests corresponding to the changes introduced in this PR.
• I have made sure local checks have passed.

Local validation:

• uv run --extra semantic-kernel-core pytest packages/autogen-ext/tests/models/test_sk_chat_completion_adapter.py -q
• uv run ruff format --check packages/autogen-ext/src/autogen_ext/models/semantic_kernel/_sk_chat_completion_adapter.py packages/autogen-ext/tests/models/test_sk_chat_completion_adapter.py
• uv run ruff check packages/autogen-ext/src/autogen_ext/models/semantic_kernel/_sk_chat_completion_adapter.py packages/autogen-ext/tests/models/test_sk_chat_completion_adapter.py
• uv run pyright packages/autogen-ext/src/autogen_ext/models/semantic_kernel/_sk_chat_completion_adapter.py packages/autogen-ext/tests/models/test_sk_chat_completion_adapter.py
• git diff --check origin/main...HEAD

[meaqua9420]

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