Add pickle test for FFTSizeError #1306

Job	Run time
build (macos-latest, 3.10, cc, c++, /opt/homebrew/lib/)	12m 22s
build (ubuntu-latest, 3.12, gcc, g++, /usr/local/lib)	17m 25s
build (ubuntu-latest, 3.9, gcc, g++, /usr/local/lib)	22m 21s
build (ubuntu-latest, 3.10, clang, clang++, /usr/local/lib/)	14m 55s
build (ubuntu-latest, 3.10, gcc, g++, /usr/local/lib)	13m 19s
build (ubuntu-latest, 3.13, gcc, g++, /usr/local/lib)	13m 1s
build (ubuntu-latest, 3.11, gcc, g++, /usr/local/lib)	12m 59s
build (ubuntu-latest, 3.14, gcc, g++, /usr/local/lib)	13m 59s
	2h 0m 21s

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