[XLA:Python] Fix segfault in PyLocalBuffer::Release.
[XLA:Python] Fix segfault in PyLocalBuffer::Release.

According to phawkins@, this sometimes works due to differences in how
different compilers order the .get() and .release() calls. Many thanks
to phawkins@ for figuring this out!

PiperOrigin-RevId: 307514828
Change-Id: I1efee8efaa7ff30b52990739ef4c3ce08c0f4a73

gunan/tensorflow,gunan/tensorflow,gunan/tensorflow,gunan/tensorflow,gunan/tensorflow,gunan/tensorflow,gunan/tensorflow,gunan/tensorflow,gunan/tensorflow,gunan/tensorflow,gunan/tensorflow,gunan/tensorflow