feat: `HugrMut::remove_metadata` (#1619) #2434

Job	Run time
Check for changes in Python files	3s
Check serialization schema	13s
check python 3.10	14s
Build HUGR binary	51s
check python 3.13	34s
test python 3.10	27s
test python 3.13	38s
Required checks 🐍	1s
	3m 1s

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