chore: mark-1.51.0 (microsoft#1769)

chore: set version to 1.50.0 (microsoft#1740)

chore: set release version to 1.49.0 (microsoft#1703)

chore: set version to 1.48.0 (microsoft#1688)

chore: set version to 1.47.0 (microsoft#1673)

chore: set version to 1.46.0 (microsoft#1647)

chore: mark 1.45.1 (microsoft#1633)

chore: set version to 1.45.0 (microsoft#1611)

chore: set version 1.44.0 (microsoft#1578)

chore: roll 1.43.0 (microsoft#1545)