feat: Add uipath_langchain_client, refactor code to use the new client #3130

Job	Run time
discover-testcases	6s
company-research-agent / cloud	37s
simple-local-mcp / alpha	40s
company-research-agent / staging	39s
init-flow / cloud	53s
debug-breakpoints / staging	45s
chat-models / alpha	1m 56s
company-research-agent / alpha	36s
debug-breakpoints / alpha	47s
dev-console / cloud	2m 31s
ticket-classification / staging	44s
init-flow / alpha	54s
dev-console / alpha	2m 25s
ticket-classification / cloud	44s
debug-breakpoints / cloud	48s
simple-local-mcp / cloud	38s
ticket-classification / alpha	45s
chat-models / staging	1m 48s
chat-models / cloud	1m 36s
dev-console / staging	2m 24s
simple-local-mcp / staging	40s
init-flow / staging	55s
	23m 51s

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