feat: update connectionString appName param - [MCP-68] #1620

Job	Run time
Run Atlas tests	3m 12s
Run MongoDB tests (ubuntu-latest)	1m 58s
Run MongoDB tests (windows-latest)	5m 43s
Run MongoDB tests (macos-latest)	2m 48s
Report Coverage	40s
Run Atlas tests	2m 57s
Run MongoDB tests (ubuntu-latest)	1m 58s
Run MongoDB tests (windows-latest)	5m 43s
Run MongoDB tests (macos-latest)	2m 48s
Report Coverage	43s
	28m 30s

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