Switch to using 'tensorflow' for Apple silicon Macs for TensorFlow v2.16.1+

[matthewfeickert]

As noted in PR #2448, the tensorflow v2.16.1 release notes mention:

• Apple Silicon users: If you previously installed TensorFlow using pip install tensorflow-macos, please update your installation method. Use pip install tensorflow from now on.

• Mac x86 users: Mac x86 builds are being deprecated and will no longer be released as a Pip package from TF 2.17 onwards.

This will require an effective revert of PR #2119 with the removal of

pyhf/pyproject.toml

Line 74 in af5d952

"tensorflow-macos>=2.7.0,!=2.16.1; platform_machine == 'arm64' and platform_system == 'Darwin'", # c.f. PR #2119, #2448

once tensorflow-probability supports Keras v3.0 and PR #2448 can be reverted.

[matthewfeickert]

cc @alexander-held as a bit of a heads up, though no action is needed now.

[matthewfeickert]

We should also apparently be using tensorflow-probability extra to use tensorflow with tensorflow-probability.

tensorflow/probability#1796

So

pyhf/pyproject.toml

Lines 72 to 76 in af5d952

	tensorflow = [
	"tensorflow>=2.7.0,!=2.16.1; platform_machine != 'arm64'", # c.f. PR #1962, #2448
	"tensorflow-macos>=2.7.0,!=2.16.1; platform_machine == 'arm64' and platform_system == 'Darwin'", # c.f. PR #2119, #2448
	"tensorflow-probability>=0.11.0", # c.f. PR #1657
	]

can get reduced to just

tensorflow = ["tensorflow-probability[tf]>=0.24.0"]

or whatever the next release of tensorflow-probability is after v0.23.0 that includes tensorflow/probability@988f023 in it.