cmd/go: don't run TestTestRaceInstall in short mode
cmd/go: don't run TestTestRaceInstall in short mode

Fixes #20158

Change-Id: Iefa9a33569eb805f5ab678d17c37787835bc7efa
Reviewed-on: https://go-review.googlesource.com/42134
Run-TryBot: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

nawawi/go,nawawi/go,vsekhar/elastic-go,ImJasonH/go,vsekhar/elastic-go,vsekhar/elastic-go,derekmarcotte/go,codestation/go,cloudflare/go,akutz/go,codestation/go,Cofyc/go,CAFxX/go,golang/go,ImJasonH/go,cloudflare/go,nawawi/go,vsekhar/elastic-go,CAFxX/go,josharian/go,akutz/go,josharian/go,polyverse-security/go,polyverse-security/go,christopher-henderson/Go,derekmarcotte/go,polyverse-security/go,derekmarcotte/go,Cofyc/go,golang/go,cloudflare/go,akutz/go,josharian/go,derekmarcotte/go,nawawi/go,akutz/go,cloudflare/go,derekmarcotte/go,vsekhar/elastic-go,codestation/go,Cofyc/go,cloudflare/go,golang/go,nawawi/go,akutz/go,cloudflare/go,ImJasonH/go,ImJasonH/go,cloudflare/go,nawawi/go,Cofyc/go,Cofyc/go,codestation/go,ImJasonH/go,josharian/go,Cofyc/go,golang/go,CAFxX/go,josharian/go,derekmarcotte/go,vsekhar/elastic-go,golang/go,derekmarcotte/go,codestation/go,nawawi/go,golang/go,polyverse-security/go,akutz/go,CAFxX/go,polyverse-security/go,CAFxX/go,polyverse-security/go,CAFxX/go,codestation/go,ImJasonH/go,derekmarcotte/go,polyverse-security/go,golang/go,vsekhar/elastic-go,vsekhar/elastic-go,Cofyc/go,nawawi/go,akutz/go,polyverse-security/go,ImJasonH/go,codestation/go,josharian/go,josharian/go,ImJasonH/go,codestation/go,golang/go,cloudflare/go,CAFxX/go,akutz/go,Cofyc/go,josharian/go,CAFxX/go