Add uipath_langchain_client, refactor code to use the new client #3128

Job	Run time
discover-testcases	4s
chat-models / alpha	1m 47s
company-research-agent / staging	34s
chat-models / cloud	1m 50s
chat-models / staging	1m 38s
dev-console / alpha	2m 25s
dev-console / staging	2m 31s
init-flow / alpha	53s
debug-breakpoints / staging	50s
init-flow / cloud	56s
simple-local-mcp / alpha	36s
ticket-classification / alpha	47s
init-flow / staging	56s
ticket-classification / cloud	42s
debug-breakpoints / alpha	45s
simple-local-mcp / staging	39s
debug-breakpoints / cloud	49s
company-research-agent / cloud	35s
dev-console / cloud	2m 29s
simple-local-mcp / cloud	41s
company-research-agent / alpha	35s
ticket-classification / staging	38s
	23m 40s

Provide feedback