Update attributes in LLM events

[lrafeei]

Overview

This PR

• Removes appName from LLM events
• Removes api_key from LLM events
• Returns the vendor names in lower case characters

Removal of transaction_id will be in a separate PR

[github-actions[bot]]

🦙 MegaLinter status: ❌ ERROR

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ PYTHON	bandit	3		0	6.64s
✅ PYTHON	black	20	0	0	2.89s
✅ PYTHON	flake8	20		0	1.59s
✅ PYTHON	isort	20	0	0	0.37s
❌ PYTHON	pylint	20		17	11.78s

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 81.84%. Comparing base (b200fb0) to head (d299be1). Report is 45 commits behind head on develop-ai-limited-preview-3.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop-ai-limited-preview-3 #1082 +/- ## ================================================================ - Coverage 81.87% 81.84% -0.04% ================================================================ Files 192 192 Lines 21151 21130 -21 Branches 3710 3710 ================================================================ - Hits 17317 17293 -24 - Misses 2773 2776 +3 Partials 1061 1061 ```

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