Drop PHP 8.0 support #2557

Job	Run time
PHP 8.1, Solr 7 cloud	2m 33s
PHP 8.1, Solr 7 server	1m 31s
PHP 8.1, Solr 8 cloud	4m 56s
PHP 8.1, Solr 8 server	3m 55s
PHP 8.1, Solr 9 cloud	5m 9s
PHP 8.1, Solr 9 server	4m 3s
PHP 8.2, Solr 7 cloud	2m 36s
PHP 8.2, Solr 7 server	1m 32s
PHP 8.2, Solr 8 cloud	4m 54s
PHP 8.2, Solr 8 server	3m 54s
PHP 8.2, Solr 9 cloud	5m 13s
PHP 8.2, Solr 9 server	4m 0s
PHP 8.3, Solr 7 cloud	2m 34s
PHP 8.3, Solr 7 server	1m 32s
PHP 8.3, Solr 8 cloud	3m 50s
PHP 8.3, Solr 8 server	2m 49s
PHP 8.3, Solr 9 cloud	3m 50s
PHP 8.3, Solr 9 server	2m 49s
PHP 8.4, Solr 7 cloud	2m 35s
PHP 8.4, Solr 7 server	1m 28s
PHP 8.4, Solr 8 cloud	3m 45s
PHP 8.4, Solr 8 server	2m 51s
PHP 8.4, Solr 9 cloud	3m 51s
PHP 8.4, Solr 9 server	2m 55s
Upload coverage to codecov.io	7s
	1h 19m 12s

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