Fix workspace allocation in LAPACKE strsen/dtrsen (Reference-LAPACK PR 1144) #5889

Job	Run time
build (ubuntu-latest, flang, cmake)	10m 9s
build (ubuntu-latest, gfortran, make)	21m 49s
msys2 (UCRT64, int32, Release)	14m 17s
build (macos-latest, gfortran, make)	3m 24s
build (ubuntu-latest, flang, make)	17m 38s
msys2 (MINGW32, int32, Release)	15m 4s
build (macos-latest, gfortran, cmake)	31m 8s
build (ubuntu-latest, gfortran, cmake)	46m 5s
msys2 (CLANG64, int32, Release)	17m 34s
msys2 (UCRT64, int64, Release)	13m 53s
msys2 (UCRT64, int32, None, mingw-w64-ucrt-x86_64, fc)	12m 59s
msys2 (CLANG64, int64, Release)	17m 50s
cross_build (riscv64, riscv64-linux-gnu, TARGET=RISCV64_GENERIC)	3m 6s
cross_build (mips64el, mips64el-linux-gnuabi64, DYNAMIC_ARCH=1 TARGET=GENERIC)	3m 43s
cross_build (mipsel, mipsel-linux-gnu, TARGET=MIPS1004K)	3m 37s
neoverse_build	8m 18s
cross_build (alpha, alpha-linux-gnu, TARGET=EV4)	2m 39s
	4h 3m 13s

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