feat: Add API for requesting a new mesh from the MeshManager #244

Job	Run time
test / matrix-prep-os	3s
test / matrix-prep-bazelversion	6s
test / test (ubuntu-latest, 7.3.1, ., true)	4m 35s
test / test (ubuntu-latest, 8.0.0, ., true)	4m 16s
	9m 0s

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