add tanhshrink op #5253

Job	Run time
pytester (ubuntu-22.04, 3.10, latest, core)	11m 29s
pytester (ubuntu-22.04, 3.10, latest, ops)	29m 45s
pytester (ubuntu-22.04, 3.10, nightly, core)	12m 1s
pytester (ubuntu-22.04, 3.10, nightly, ops)	30m 16s
pytester (macOS-14, 3.10, latest, core)	8m 23s
pytester (macOS-14, 3.10, latest, ops)	22m 36s
pytester (macOS-14, 3.10, nightly, core)	9m 56s
pytester (macOS-14, 3.10, nightly, ops)	23m 18s
pytester (windows-2022, 3.10, latest, core)	25m 21s
pytester (windows-2022, 3.10, nightly, core)	25m 23s
pytester (ubuntu-22.04, 3.11, latest)	24m 56s
pytester (ubuntu-22.04, 3.12, latest)	27m 59s
testing-guardian	1s
	4h 11m 24s

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