Figure out `hie-bios` normalise import-dirs and `TargetFile` already ?

[soulomoon]

Sidenote: extremely strictly speaking, this should be unnecessary, as hie-bios should normalise import-dirs and TargetFile already. But perhaps we should simply open an issue to investigate later.

Originally posted by @fendor in #4231 (comment)

[soulomoon]

haskell-language-server/ghcide/session-loader/Development/IDE/Session.hs

Line 1246 in 322ac35

makeDynFlagsAbsolute compRoot -- makeDynFlagsAbsolute already accounts for workingDirectory

It we do make it absolute already