Drop PHP 8.0 support #2554

Job	Run time
PHP 8.1, Solr 7 cloud	2m 32s
PHP 8.1, Solr 7 server	1m 33s
PHP 8.1, Solr 8 cloud	3m 6s
PHP 8.1, Solr 8 server	3m 6s
PHP 8.1, Solr 9 cloud	3m 5s
PHP 8.1, Solr 9 server	3m 6s
PHP 8.2, Solr 7 cloud	2m 32s
PHP 8.2, Solr 7 server	1m 33s
PHP 8.2, Solr 8 cloud	3m 5s
PHP 8.2, Solr 8 server	3m 5s
PHP 8.2, Solr 9 cloud	3m 5s
PHP 8.2, Solr 9 server	3m 4s
PHP 8.3, Solr 7 cloud	2m 28s
PHP 8.3, Solr 7 server	1m 30s
PHP 8.3, Solr 8 cloud	3m 3s
PHP 8.3, Solr 8 server	2m 47s
PHP 8.3, Solr 9 cloud	3m 3s
PHP 8.3, Solr 9 server	2m 50s
PHP 8.4, Solr 7 cloud	2m 29s
PHP 8.4, Solr 7 server	1m 34s
PHP 8.4, Solr 8 cloud	1m 27s
PHP 8.4, Solr 8 server	1m 26s
PHP 8.4, Solr 9 cloud	1m 22s
PHP 8.4, Solr 9 server	28s
Upload coverage to codecov.io	0s
	57m 19s

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