itstool: use libxml2 to instead of python3-lxml
itstool: use libxml2 to instead of python3-lxml

Use libxml2 of oe-core to replace python3-lxml of meta-python
since meta-oe does not depend on meta-python

Signed-off-by: Hongxu Jia <d55095dfc8448df446bb9592fdc085838a3794a7@windriver.com>
Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

rehsack/meta-openembedded,schnitzeltony/meta-openembedded,rehsack/meta-openembedded,lgirdk/meta-openembedded,VCTLabs/meta-openembedded,rehsack/meta-openembedded,openembedded/meta-openembedded,VCTLabs/meta-openembedded,schnitzeltony/meta-openembedded,VCTLabs/meta-openembedded,openembedded/meta-openembedded,openembedded/meta-openembedded,lgirdk/meta-openembedded,victronenergy/meta-openembedded,openembedded/meta-openembedded,rehsack/meta-openembedded,schnitzeltony/meta-openembedded,mrchapp/meta-openembedded,schnitzeltony/meta-openembedded,victronenergy/meta-openembedded,schnitzeltony/meta-openembedded,VCTLabs/meta-openembedded,victronenergy/meta-openembedded,VCTLabs/meta-openembedded,rehsack/meta-openembedded,VCTLabs/meta-openembedded,openembedded/meta-openembedded,victronenergy/meta-openembedded,victronenergy/meta-openembedded,mrchapp/meta-openembedded,moto-timo/meta-openembedded,rehsack/meta-openembedded,lgirdk/meta-openembedded,rehsack/meta-openembedded,mrchapp/meta-openembedded,lgirdk/meta-openembedded,schnitzeltony/meta-openembedded,mrchapp/meta-openembedded,victronenergy/meta-openembedded,lgirdk/meta-openembedded,moto-timo/meta-openembedded,openembedded/meta-openembedded,schnitzeltony/meta-openembedded,lgirdk/meta-openembedded,VCTLabs/meta-openembedded,lgirdk/meta-openembedded,moto-timo/meta-openembedded,mrchapp/meta-openembedded,moto-timo/meta-openembedded,mrchapp/meta-openembedded,openembedded/meta-openembedded,VCTLabs/meta-openembedded,victronenergy/meta-openembedded,openembedded/meta-openembedded,moto-timo/meta-openembedded,mrchapp/meta-openembedded