Python: Allow configuration of parameters for BingGroundingTool

[KanchiShimono]

Motivation and Context

This PR enables customization of parameters such as the number of search results when using the Bing Grounding Tool with AzureAIAgent.

Description

• Allow configuration of parameters (such as count, set_lang, etc.) for BingGroundingTool.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[markwallace-microsoft]

Python Test Coverage Report •

File	Stmts	Miss	Cover	Missing
agents/azure_ai
azure_ai_agent.py	359	177	50%	98, 100–103, 105–107, 109–114, 116, 118, 120–122, 124, 141, 143–146, 148–153, 155, 160–161, 166–169, 174–178, 180–183, 185–191, 196, 198–201, 203–205, 207–210, 212, 214, 224–225, 227–230, 232–233, 238, 240–246, 248, 281, 292–293, 298–299, 302, 307–312, 319–320, 322, 327–328, 339–345, 397, 399, 405, 416, 419, 421, 423, 425, 459, 490–492, 494, 496–497, 499–502, 504–505, 508, 511–520, 522, 531–532, 535–537, 539–540, 550–551, 553, 571, 573, 576, 578–579, 581–582, 584, 593–594, 596, 598–601, 604, 606, 609–611, 615, 684, 790, 894, 967
TOTAL	26998	4575	83%

Python Unit Test Overview

Tests	Skipped	Failures	Errors	Time
3616	18 💤	0 ❌	0 🔥	2m 16s ⏱️