ci: split release-please into independent release and PR creation steps #451

Job	Run time
server-ai-langchain-windows (3.12)	23s
server-ai-langchain-linux (3.10)	22s
server-ai-langchain-windows (3.10)	19s
server-ai-windows (3.11)	19s
server-ai-langchain-windows (3.13)	31s
server-ai-openai-windows (3.10)	22s
server-ai-windows (3.13)	31s
server-ai-langchain-linux (3.11)	21s
server-ai-openai-windows (3.11)	24s
server-ai-openai-windows (3.12)	21s
server-ai-windows (3.12)	19s
server-ai-openai-linux (3.11)	27s
server-ai-langchain-linux (3.12)	20s
server-ai-windows (3.10)	26s
server-ai-langchain-linux (3.13)	24s
server-ai-linux (3.12)	16s
server-ai-openai-windows (3.13)	26s
server-ai-linux (3.13)	20s
server-ai-optimization-windows (3.11)	17s
server-ai-langchain-windows (3.11)	26s
server-ai-openai-linux (3.13)	23s
server-ai-linux (3.11)	15s
server-ai-optimization-windows (3.10)	22s
server-ai-openai-linux (3.12)	25s
server-ai-openai-linux (3.10)	27s
server-ai-linux (3.10)	17s
server-ai-optimization-windows (3.13)	20s
server-ai-optimization-linux (3.10)	13s
server-ai-optimization-linux (3.11)	15s
server-ai-optimization-linux (3.13)	10s
server-ai-optimization-linux (3.12)	9s
server-ai-optimization-windows (3.12)	21s
	11m 11s

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