Bump to TF2.15 #3454

Job	Run time
Lint	3m 38s
Lint for Docs	10s
Linux	18m 46s
Bazel Linux	40m 35s
macOS	40m 8s
Bazel macOS arm64	1s
Bazel macOS	51m 2s
Bazel Windows	19m 22s
Build Number	0s
Wheel ${{ matrix.python }} Windows	0s
Test ${{ matrix.python }} Windows	0s
Nightly ${{ matrix.python }} Windows	0s
Wheel ${{ matrix.python }} Linux	0s
Test ${{ matrix.python }} Linux	0s
Nightly ${{ matrix.python }} Linux	0s
Wheel 3.9 macOS	40s
Wheel 3.10 macOS	31s
Wheel 3.11 macOS	38s
Test 3.9 macOS	1h 31m 24s
Nightly ${{ matrix.python }} macOS	0s
Release	0s
Release Candidate	0s
Docker Nightly	0s
Nightly	0s
Docker Release	0s
Wheel ${{ matrix.python }} macOS arm64	0s
Release (MacOS arm64)	0s
Release Candidate (MacOS arm64)	0s
	4h 26m 55s

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