refactor(ai): Remove gen_ai.tool.type span attribute

[ericapisani]

Summary

• Remove setting of gen_ai.tool.type span data from all AI integrations (openai_agents, pydantic_ai, google_genai)
• Remove the SPANDATA.GEN_AI_TOOL_TYPE constant
• Clean up now-unused MCPServer/HAS_MCP imports in pydantic_ai integration

Closes PY-2286

Test plan

• Linters pass (tox -e linters)
• mypy passes (tox -e mypy)
• Integration tests pass for openai_agents, pydantic_ai, google_genai

🤖 Generated with Claude Code

[linear-code]

PY-2286 Remove setting of `gen_ai.tool.type` from within the Python SDK

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

📋 Changelog Preview

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New Features ✨

• (ai) Redact base64 data URLs in image_url content blocks by ericapisani in #5953
• (integrations) Instrument pyreqwest tracing by servusdei2018 in #5682

Internal Changes 🔧

• (ai) Remove gen_ai.tool.type span attribute by ericapisani in #5964

• (openai) Split token counting by API for easier deprecation by ericapisani in #5930
• (opentelemetry) Ignore mypy error by alexander-alderman-webb in #5927
• Fix license metadata in setup.py by sl0thentr0py in #5934
• Update validate-pr workflow by stephanie-anderson in #5931

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_{🤖 This preview updates automatically when you update the PR.}

[github-actions]

Codecov Results 📊

✅ 1852 passed | ⏭️ 317 skipped | Total: 2169 | Pass Rate: 85.38% | Execution Time: 3m 34s

All tests are passing successfully.

✅ Patch coverage is 100.00%. Project has 12388 uncovered lines.

Files with missing lines (6)

File	Patch %	Lines
utils.py	0.00%	⚠️ 480 Missing
utils.py	14.04%	⚠️ 98 Missing
tools.py	0.00%	⚠️ 79 Missing
execute_tool.py	0.00%	⚠️ 24 Missing
execute_tool.py	0.00%	⚠️ 21 Missing
consts.py	99.16%	⚠️ 2 Missing

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