chores: fetch googletest via CMake #8181

Job	Run time
Run tests (x9dp2019)	3m 10s
Run tests (tx16s)	7m 2s
Run tests (nv14)	8m 10s
Run tests (el18)	7m 5s
Run tests (t12)	3m 13s
Run tests (t16)	8m 35s
Run tests (t18)	7m 36s
Run tests (t8)	4m 20s
Run tests (tlite)	3m 22s
Run tests (t20)	4m 20s
Run tests (tx12)	3m 22s
Run tests (x10)	8m 43s
Run tests (x12s)	9m 31s
Run tests (x7)	4m 22s
Run tests (x9d)	3m 52s
Run tests (x9dp)	3m 51s
Run tests (x9e)	3m 57s
Run tests (x9lite)	3m 15s
Run tests (x9lites)	3m 39s
Run tests (xlite)	3m 25s
Run tests (xlites)	4m 21s
Run builds (nv14;el18)	7m 38s
Run builds (t12)	2m 22s
Run builds (t16)	4m 58s
Run builds (t18)	5m 22s
Run builds (t8;zorro;pocket;commando8)	5m 2s
Run builds (tlite;tpro;tprov2;lr3pro)	5m 51s
Run builds (t20)	2m 30s
Run builds (tx12;tx12mk2;boxer)	4m 7s
Run builds (tx16s)	4m 40s
Run builds (x10;x10-access)	8m 12s
Run builds (x12s)	4m 41s
Run builds (x7;x7-access)	3m 3s
Run builds (x9d;x9dp;x9dp2019)	4m 39s
Run builds (x9e;x9e-hall)	3m 13s
Run builds (x9lite;x9lites)	3m 8s
Run builds (xlite;xlites)	3m 16s
	3h 1m 53s

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