Vulkan: Rework finishOneCommandBatchAndCleanup This is a follow up for: Vulkan: Fix finishOneCommandBatchAndCleanupImplLocked crrev.com/c/angle/angle/+/6055419 The original `finishOneCommandBatchAndCleanup()` was not optimal in a sense that it is always finish a batch, when cleaning existing garbage may be sufficient. Also, because there was no feedback from the `cleanupGarbage()`, this method may just end up finishing one batch without cleaning any garbage, causing clients to "think" that there is no more garbage to clean. Additionally, `cleanupGarbage()` was called under the `CommendQueue::mMutex` lock, causing uncessary blocking. This change replaces this method with new `cleanupSomeGarbage()`. It solves all problems of the original method described above. It no longer has the `retireFinishedCommandsLocked()` call, because it is not necessary in scenarios where `cleanupSomeGarbage()` is used. In order to implement the new method, output feedback parameter was added to the `cleanupGarbage()` as well as to all methods that it uses. Bug: b/280304441 Change-Id: I7078899838609a0c3e5edbc4f507c2fe4364380a Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6063126 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Charlie Lao <cclao@google.com> Commit-Queue: Igor Nazarov <i.nazarov@samsung.com>