test-bot: fix bottling non-testing jobs.
test-bot: fix bottling non-testing jobs.

Need to handle when the `BOT_PARAMS` are `nil`.

DomT4/brew,alyssais/brew,tonyg/homebrew,Homebrew/brew,EricFromCanada/brew,hanxue/linuxbrew,ilovezfs/brew,nandub/brew,sjackman/homebrew,mahori/brew,reitermarkus/brew,aw1621107/brew,toonetown/homebrew,mahori/brew,claui/brew,muellermartin/dist,jmsundar/brew,jmsundar/brew,claui/brew,JCount/brew,konqui/brew,sjackman/homebrew,konqui/brew,vitorgalvao/brew,MikeMcQuaid/brew,mgrimes/brew,ilovezfs/brew,konqui/brew,zmwangx/brew,aw1621107/brew,alyssais/brew,pseudocody/brew,mgrimes/brew,toonetown/homebrew,ilovezfs/brew,Linuxbrew/brew,gregory-nisbet/brew,rwhogg/brew,maxim-belkin/brew,toonetown/homebrew,rwhogg/brew,reitermarkus/brew,muellermartin/dist,hanxue/linuxbrew,EricFromCanada/brew,nandub/brew,amar-laksh/brew_sudo,vitorgalvao/brew,tonyg/homebrew,muellermartin/dist,bfontaine/brew,konqui/brew,pseudocody/brew,gregory-nisbet/brew,bfontaine/brew,MikeMcQuaid/brew,amar-laksh/brew_sudo,vitorgalvao/brew,sjackman/homebrew,vitorgalvao/brew,DomT4/brew,DomT4/brew,gregory-nisbet/brew,Linuxbrew/brew,mahori/brew,hanxue/linuxbrew,Linuxbrew/brew,reelsense/brew,Homebrew/brew,EricFromCanada/brew,JCount/brew,Linuxbrew/brew,reitermarkus/brew,EricFromCanada/brew,MikeMcQuaid/brew,zmwangx/brew,alyssais/brew,aw1621107/brew,JCount/brew,Homebrew/brew,claui/brew,jmsundar/brew,reitermarkus/brew,nandub/brew,nandub/brew,claui/brew,bfontaine/brew,reelsense/brew,reelsense/brew,mgrimes/brew,tonyg/homebrew,Homebrew/brew,maxim-belkin/brew,rwhogg/brew,palxex/brew,palxex/brew,pseudocody/brew,MikeMcQuaid/brew,zmwangx/brew,mahori/brew,DomT4/brew,amar-laksh/brew_sudo,sjackman/homebrew,JCount/brew,maxim-belkin/brew,palxex/brew