PYTHON-5289 Validate ignored bits are 0 on write for bson.BinaryVector #7748

Job	Run time
Link Check	4m 56s
static	3m 14s
Test using minimum dependencies and supported Python	31s
CPython pypy-3.10-ubuntu-latest	10m 22s
CPython 3.13-ubuntu-latest	8m 50s
CPython 3.13t-ubuntu-latest	9m 1s
Docs Checks	30s
Make an sdist	14s
Typing Tests (3.9)	1m 17s
Typing Tests (3.11)	1m 8s
CPython 3.9-ubuntu-latest	8m 58s
DocTest	50s
Test async's minimum dependencies and Python	44s
Install from SDist and Test	47s
	51m 22s

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