APIv5: add `realm_id` param to `vlob_update` #21961

Job	Run time
dispatch	7s
📊 Q&A	1m 8s
spelling / cspell	20s
docs	0s
rust / 🐧 Linux: 🦀 Rust tests	1m 56s
rust / 🍎 macOS: 🦀 Rust tests	1m 48s
web / 🌐 Web tests	1m 47s
rust / 🏁 Windows: 🦀 Rust tests	1m 40s
python / (🐧 Linux only): 🐍 Python server tests	1m 55s
⭐ CI is happy ⭐	1s
	10m 42s

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