Add vdot to BaseFakeNumpyNamespace #2007

Job	Run time
Documentation	2m 41s
Pytest Conda Py3 POCL	2m 50s
Ruff	7s
Examples Conda Py3	2m 0s
Typos	5s
basedpyright	2m 4s
Pytest Conda Py3 Intel	2m 30s
Tests for downstream project meshmode	10m 52s
Tests for downstream project mirgecom_examples	5s
Tests for downstream project grudge	11m 40s
Tests for downstream project mirgecom	7s
	35m 1s

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