Add subcomponent attribute to Autogen instrumentation.

[umaannamalai]

This PR adds the subcomponent attribute for tool calls and agent calls to Autogen instrumentation.

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ ACTION	actionlint	7		0	0	1.16s
✅ MARKDOWN	markdownlint	7	0	0	0	1.42s
✅ PYTHON	ruff	967	0	0	0	1.17s
✅ PYTHON	ruff-format	967	0	0	0	0.34s
✅ YAML	prettier	15	0	0	0	1.49s
✅ YAML	v8r	15		0	0	6.05s
✅ YAML	yamllint	15		0	0	0.66s

See detailed reports in MegaLinter artifacts

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
⚠️ Please upload report for BASE (develop-agentic-subcomponent-attrs@0480f61). Learn more about missing BASE report.

Additional details and impacted files

@@                          Coverage Diff                          @@
##             develop-agentic-subcomponent-attrs    #1654   +/-   ##
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  Coverage                                      ?   81.72%           
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  Files                                         ?      210           
  Lines                                         ?    24681           
  Branches                                      ?     3884           
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  Hits                                          ?    20170           
  Misses                                        ?     3197           
  Partials                                      ?     1314           

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