Added some function to query the texture compiler to see if a texture is being compiled.
#jira UETOOL-3856
#rb Alexis.Matte
#preflight 61264df145848f0001473a6b
#ROBOMERGE-SOURCE: CL 17318068 in //UE5/Main/...
#ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v861-17282326)
[CL 17318074 by julien stjean in ue5-release-engine-test branch]