Drop PHP 8.0 support #2987

Job	Run time
PHP 8.1, Solr 7 cloud	2m 41s
PHP 8.1, Solr 7 server	1m 34s
PHP 8.1, Solr 8 cloud	5m 2s
PHP 8.1, Solr 8 server	4m 1s
PHP 8.1, Solr 9 cloud	5m 12s
PHP 8.1, Solr 9 server	4m 6s
PHP 8.2, Solr 7 cloud	2m 35s
PHP 8.2, Solr 7 server	1m 38s
PHP 8.2, Solr 8 cloud	5m 3s
PHP 8.2, Solr 8 server	4m 7s
PHP 8.2, Solr 9 cloud	5m 4s
PHP 8.2, Solr 9 server	4m 5s
PHP 8.3, Solr 7 cloud	2m 33s
PHP 8.3, Solr 7 server	1m 37s
PHP 8.3, Solr 8 cloud	3m 51s
PHP 8.3, Solr 8 server	2m 54s
PHP 8.3, Solr 9 cloud	3m 49s
PHP 8.3, Solr 9 server	2m 55s
PHP 8.4, Solr 7 cloud	2m 31s
PHP 8.4, Solr 7 server	1m 41s
PHP 8.4, Solr 8 cloud	3m 43s
PHP 8.4, Solr 8 server	2m 44s
PHP 8.4, Solr 9 cloud	3m 51s
PHP 8.4, Solr 9 server	2m 59s
Upload coverage to codecov.io	9s
	1h 20m 25s

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