Moved GPU trace event and occlusion query commands that were on the
primary command buffer to the SecondaryCommandBuffer (SCB). Putting
these commands on outside render pass SCB and flushing those commands
to primary on-demand as needed to maintain ordering of commands.

For resetQueryPool command used by occlusion query, allow the SCB
to queue up that command for inside RenderPass SCB. This avoids
ending a renderPass prematurely and allows all outstanding reset
commands to be executed before the beginRenderPass command since
the resets must occur outside of a renderPass.

This is groundwork to simplify the hand-off of SCBs from the main
thread to a worker thread. Long-term we'd like a single SCB that
can handle both inside and outside renderPass commands at the same
time to pass to the worker thread for processing into a primary CB.

Bug: b/154030403
Bug: angleproject:4603
Change-Id: Ic1023ae27a9b14435743549ea9933edf1c4b318b
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2168114Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
Reviewed-by: Charlie Lao <cclao@google.com>
Commit-Queue: Tobin Ehlis <tobine@google.com>