hip

`amrex.omp_threads`: Can Avoid SMT (#3607) #71

Job	Run time
HIP EB [configure 2D]	13m 57s
HIP ROCm Flang C++17 [tests]	41m 25s
HIP EB 3D GMake	28m 21s
HIP ROCm [email protected] C++17 [tests-hipcc]	23m 23s
save_pr_number	0s
	1h 47m 6s

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