CI-windows: make Bazel operate under T:\src (#714)
CI-windows: make Bazel operate under T:\src (#714)

Files under T:\src are less likely to be locked by various system check
routines. This can hopefully reduce flakes.

Bug: b/182387034

google/agi,google/agi,google/agi,google/agi,google/agi,google/agi,google/agi,google/agi