update php and pimcore, fix deprecations (#448) #1068

Job	Run time
setup-matrix	3s
static-analysis (8.4, highest, 12.x-dev as 12.99.9, true, true) / Static analysis with phpstan	1m 13s
static-analysis (8.1, lowest, false, false) / Static analysis with phpstan	56s
static-analysis (8.4, highest, false, true) / Static analysis with phpstan	1m 11s
	3m 23s

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