search: handle tap not found and suggest update.
search: handle tap not found and suggest update.

Closes Homebrew/homebrew#25706.
Closes Homebrew/homebrew#25682.

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