[presets] Add clang install to bots that test indexstore-db/sourcekit-lsp
[presets] Add clang install to bots that test indexstore-db/sourcekit-lsp

At a minimum, we need to install libIndexStore to enable testing the
indexer, but it's better to also include clang/clangd, since this lets
us enable all of our tests on these bots. This commit uses the
swift-install-components and llvm-install-components from the Package
bots, which increases the similarity between our PR tests and package
bots.

In addition to the sourcekit-lsp/indexstore-db PR test bots, this
affects the following bots that test indexstore-db and didn't already
install clang:

* Linux
  * incremental
  * incremental long test
  * swiftpm PR test

* macOS
  * PR test
  * PR smoke test
  * incremental
  * swiftpm PR test

Based on looking at recent build logs for the package bots, this should
only add <5 seconds to the incremental build.

xwu/swift,sschiau/swift,roambotics/swift,apple/swift,xwu/swift,stephentyrone/swift,parkera/swift,aschwaighofer/swift,gribozavr/swift,xwu/swift,glessard/swift,shahmishal/swift,nathawes/swift,shahmishal/swift,ahoppen/swift,lorentey/swift,parkera/swift,shahmishal/swift,JGiola/swift,jmgc/swift,jmgc/swift,stephentyrone/swift,atrick/swift,stephentyrone/swift,hooman/swift,CodaFi/swift,apple/swift,devincoughlin/swift,nathawes/swift,allevato/swift,xwu/swift,hooman/swift,shahmishal/swift,harlanhaskins/swift,devincoughlin/swift,airspeedswift/swift,devincoughlin/swift,roambotics/swift,shahmishal/swift,glessard/swift,airspeedswift/swift,jckarter/swift,apple/swift,atrick/swift,harlanhaskins/swift,jmgc/swift,tkremenek/swift,karwa/swift,lorentey/swift,JGiola/swift,sschiau/swift,xwu/swift,gribozavr/swift,JGiola/swift,glessard/swift,shahmishal/swift,CodaFi/swift,rudkx/swift,jckarter/swift,ahoppen/swift,airspeedswift/swift,nathawes/swift,JGiola/swift,sschiau/swift,gribozavr/swift,lorentey/swift,tkremenek/swift,shahmishal/swift,xwu/swift,allevato/swift,aschwaighofer/swift,atrick/swift,nathawes/swift,lorentey/swift,rudkx/swift,atrick/swift,allevato/swift,karwa/swift,roambotics/swift,CodaFi/swift,atrick/swift,benlangmuir/swift,aschwaighofer/swift,harlanhaskins/swift,stephentyrone/swift,gregomni/swift,devincoughlin/swift,parkera/swift,sschiau/swift,jmgc/swift,rudkx/swift,tkremenek/swift,glessard/swift,apple/swift,ahoppen/swift,jckarter/swift,jckarter/swift,lorentey/swift,harlanhaskins/swift,nathawes/swift,nathawes/swift,devincoughlin/swift,allevato/swift,allevato/swift,parkera/swift,nathawes/swift,karwa/swift,airspeedswift/swift,hooman/swift,hooman/swift,CodaFi/swift,sschiau/swift,parkera/swift,aschwaighofer/swift,lorentey/swift,rudkx/swift,karwa/swift,airspeedswift/swift,CodaFi/swift,apple/swift,karwa/swift,JGiola/swift,aschwaighofer/swift,atrick/swift,ahoppen/swift,benlangmuir/swift,lorentey/swift,airspeedswift/swift,allevato/swift,rudkx/swift,xwu/swift,sschiau/swift,roambotics/swift,roambotics/swift,gribozavr/swift,jmgc/swift,karwa/swift,lorentey/swift,stephentyrone/swift,gregomni/swift,sschiau/swift,devincoughlin/swift,benlangmuir/swift,devincoughlin/swift,jckarter/swift,hooman/swift,gribozavr/swift,jmgc/swift,gregomni/swift,gregomni/swift,hooman/swift,gribozavr/swift,rudkx/swift,harlanhaskins/swift,apple/swift,jckarter/swift,ahoppen/swift,shahmishal/swift,aschwaighofer/swift,CodaFi/swift,parkera/swift,gribozavr/swift,parkera/swift,stephentyrone/swift,tkremenek/swift,gregomni/swift,tkremenek/swift,roambotics/swift,benlangmuir/swift,allevato/swift,JGiola/swift,hooman/swift,karwa/swift,benlangmuir/swift,parkera/swift,airspeedswift/swift,gribozavr/swift,glessard/swift,aschwaighofer/swift,gregomni/swift,tkremenek/swift,karwa/swift,harlanhaskins/swift,sschiau/swift,CodaFi/swift,stephentyrone/swift,glessard/swift,jmgc/swift,benlangmuir/swift,tkremenek/swift,ahoppen/swift,jckarter/swift,devincoughlin/swift,harlanhaskins/swift