Update to Bevy 0.15 #845

Job	Run time
dynamic-2d-3d-test (windows-latest)	24m 32s
test (windows-latest)	19m 29s
dynamic-2d-3d-test (ubuntu-latest)	14m 39s
test (ubuntu-latest)	11m 23s
dynamic-2d-3d-test (macos-latest)	9m 46s
test (macos-latest)	10m 39s
full-test (windows-latest)	30m 46s
lint	3m 41s
progress-tracking-test (windows-latest)	24m 58s
progress-tracking-test (ubuntu-latest)	15m 12s
full-test (ubuntu-latest)	17m 27s
progress-tracking-test (macos-latest)	7m 44s
full-test (macos-latest)	10m 30s
	3h 20m 46s

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