Reinstate the ibm--z pictogram in design-language-website

[tay1orjones]

In carbon-design-system/carbon#18391 the ibm--z pictogram artwork was updated and removed from the deprecated list. This pictogram needs to be reinstated on design-language-website by editing the areas where it's been hidden.

design-language-website/gatsby-node.js

Lines 23 to 34 in e4daac4

	const essentialPictogramData = pictogramData
	.map(removeUnusedData)
	.filter((pictogram) => {
	if (
	pictogram.name === 'ibm--z' ||
	pictogram.name === 'ibm--z--partition' ||
	pictogram.name === 'tokyo--volcano'
	) {
	return false;
	}
	return true;
	});

design-language-website/src/components/SVGLibraries/PictogramLibrary/PictogramCategory.js

Lines 23 to 35 in e4daac4

	{pictograms
	.filter((pictogram) => {
	if (
	pictogram.name === 'ibm--z' ||
	pictogram.name === 'ibm--z--partition' ||
	pictogram.name === 'ibm--z-and-linuxone-multi-frame' ||
	pictogram.name === 'ibm--z-and-linuxone-single-frame' ||
	pictogram.name === 'tokyo--volcano'
	) {
	return false;
	}
	return true;
	})