Move lock to `netcdf-sys` and remove `lazy_static` #223

Job	Run time
Address sanitizer	1m 34s
rustfmt	1m 29s
static builds (ubuntu-latest, stable)	1m 14s
conda (ubuntu, conda-forge, stable)	1m 0s
static builds (windows-latest, stable-msvc)	6m 44s
conda (windows, conda-forge, stable)	2m 6s
static builds (windows-latest, stable-gnu)	4m 54s
test apt (stable)	55s
conda (macos, conda-forge, stable)	1m 35s
test apt (beta)	41s
test apt (nightly)	37s
static builds (macos-11, stable)	3m 6s
static builds (macos-latest, stable)	3m 42s
	29m 37s

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