fix: filter hosted_tool_call types in remove_all_tools handoff filter

[ioleksiuk]

Summary

Extends the fix in #3095 to cover one more raw input item type that the handoff filter was missing.

`hosted_tool_call` is a real tool-call item type recognized elsewhere in the SDK:

• `src/agents/run_state.py:2024` — raw item normalization treats it as a tool-call type alongside `shell_call`/`apply_patch_call`/`local_shell_call`.
• `src/agents/run_internal/tool_execution.py:2368` — `_is_hosted_mcp_approval_request` detects payloads serialized as `{"type": "hosted_tool_call", "provider_data": {"type": "mcp_approval_request"}}`.

However, `_remove_tool_types_from_input` in `src/agents/extensions/handoff_filters.py` did not include `hosted_tool_call` in its filter list. Raw `hosted_tool_call` items in `input_history` therefore survived `remove_all_tools` handoff filtering — leaking provider-level tool-call payloads (including hosted MCP approval requests in the raw `hosted_tool_call` form) into the downstream agent's history.

Add `hosted_tool_call` to the filter list and extend the parametrized list in the existing `test_removes_hosted_tool_types_from_input_history` regression test.

Test plan

• `uv run pytest tests/test_extension_filters.py -k hosted_tool` — 1 passed (with the new entry in the list).
• `uv run ruff check` on the touched files — All checks passed.

Issue number

N/A — found while auditing for the same gap that #3095 fixed for `custom_tool_call`.

Checks

• I've added new tests (if relevant)
• I've added/updated the relevant documentation (no doc changes needed)
• I've run `make lint` and `make format`
• I've made sure tests pass