Drop PHP 8.0 support #2988

Job	Run time
PHP 8.1, Solr 7 cloud	2m 31s
PHP 8.1, Solr 7 server	1m 42s
PHP 8.1, Solr 8 cloud	4m 55s
PHP 8.1, Solr 8 server	3m 57s
PHP 8.1, Solr 9 cloud	5m 13s
PHP 8.1, Solr 9 server	4m 4s
PHP 8.2, Solr 7 cloud	2m 31s
PHP 8.2, Solr 7 server	1m 46s
PHP 8.2, Solr 8 cloud	4m 57s
PHP 8.2, Solr 8 server	3m 55s
PHP 8.2, Solr 9 cloud	5m 11s
PHP 8.2, Solr 9 server	4m 3s
PHP 8.3, Solr 7 cloud	2m 32s
PHP 8.3, Solr 7 server	1m 35s
PHP 8.3, Solr 8 cloud	3m 57s
PHP 8.3, Solr 8 server	2m 48s
PHP 8.3, Solr 9 cloud	3m 49s
PHP 8.3, Solr 9 server	3m 2s
PHP 8.4, Solr 7 cloud	2m 34s
PHP 8.4, Solr 7 server	1m 31s
PHP 8.4, Solr 8 cloud	3m 51s
PHP 8.4, Solr 8 server	2m 44s
PHP 8.4, Solr 9 cloud	3m 54s
PHP 8.4, Solr 9 server	2m 53s
Upload coverage to codecov.io	8s
	1h 20m 3s

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