Decouple lxml from xmlsec in template.add_reference (#356) #750

Job	Run time
cache_libs / cache_libs (windows-11-arm)	35s
cache_libs / cache_libs (ubuntu-22.04-arm)	16s
cache_libs / cache_libs (macos-latest)	15s
cache_libs / cache_libs (ubuntu-22.04)	11s
cache_libs / cache_libs (windows-2022)	24s
manylinux (cp39-cp39, manylinux2014_x86_64)	3m 21s
manylinux (cp310-cp310, musllinux_1_2_x86_64)	3m 53s
manylinux (cp312-cp312, manylinux_2_28_x86_64)	3m 53s
manylinux (cp310-cp310, manylinux2014_x86_64)	2m 59s
manylinux (cp39-cp39, musllinux_1_2_x86_64)	3m 48s
manylinux (cp39-cp39, manylinux_2_28_x86_64)	3m 50s
manylinux (cp311-cp311, manylinux2014_x86_64)	3m 14s
manylinux (cp311-cp311, manylinux_2_28_x86_64)	3m 54s
manylinux (cp310-cp310, manylinux_2_28_x86_64)	3m 56s
manylinux (cp311-cp311, musllinux_1_2_x86_64)	3m 48s
manylinux (cp312-cp312, musllinux_1_2_x86_64)	3m 54s
manylinux (cp312-cp312, manylinux2014_x86_64)	3m 21s
manylinux (cp314-cp314, musllinux_1_2_x86_64)	4m 5s
manylinux (cp314-cp314, manylinux2014_x86_64)	3m 24s
manylinux (cp314-cp314, manylinux_2_28_x86_64)	3m 51s
manylinux (cp313-cp313, musllinux_1_2_x86_64)	3m 51s
manylinux (cp313-cp313, manylinux_2_28_x86_64)	4m 2s
manylinux (cp313-cp313, manylinux2014_x86_64)	3m 19s
	1h 8m 4s

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