SNOW-937168 Delete Centos6 usage in Jenkins and Github Actions #3140

Job	Run time
Build	2m 16s
Old JDBC TestCategoryResultSet,TestCategoryOthers on jdbc-centos7-openjdk8	10m 37s
Old JDBC TestCategoryConnection,TestCategoryStatement on jdbc-centos7-openjdk8	13m 30s
Old JDBC TestCategoryCore,TestCategoryLoader on jdbc-centos7-openjdk8	6m 13s
AWS JDBC TestCategoryResultSet,TestCategoryOthers,TestCategoryLoader on jdbc-centos7-openjdk8	58m 59s
AWS JDBC TestCategoryConnection,TestCategoryStatement on jdbc-centos7-openjdk8	21m 5s
AWS JDBC TestCategoryArrow,TestCategoryCore on jdbc-centos7-openjdk8	26m 15s
AWS JDBC TestCategoryFips on jdbc-centos7-openjdk8	1m 39s
AWS JDBC TestCategoryResultSet,TestCategoryOthers,TestCategoryLoader on jdbc-centos7-openjdk11	52m 25s
AWS JDBC TestCategoryConnection,TestCategoryStatement on jdbc-centos7-openjdk11	20m 26s
AWS JDBC TestCategoryArrow,TestCategoryCore on jdbc-centos7-openjdk11	25m 30s
AWS JDBC TestCategoryFips on jdbc-centos7-openjdk11	1m 31s
AWS JDBC TestCategoryResultSet,TestCategoryOthers,TestCategoryLoader on jdbc-centos7-openjdk17	45m 14s
AWS JDBC TestCategoryConnection,TestCategoryStatement on jdbc-centos7-openjdk17	20m 17s
AWS JDBC TestCategoryArrow,TestCategoryCore on jdbc-centos7-openjdk17	18m 40s
AWS JDBC TestCategoryFips on jdbc-centos7-openjdk17	1m 27s
	5h 26m 4s

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