The "Build Editor" step of boot tests can rebuild plugin binaries

[hach-que]

The cook step for iOS tests are outputting logs like this:

[info] [Cook BootIOS IOS] File '.uet/tmp/Project12104250227703450680/Plugins/P/Binaries/Mac/UnrealEditor-Matchmaking.dylib' was produced by Assemble Project BootIOS/ProjectPackage_12104250227703450680_Project and Build Editor BootIOS Mac/ProjectPackage_12104250227703450680_EditorBinaries
[info] [Cook BootIOS IOS] File '.uet/tmp/Project12104250227703450680/Plugins/P/Binaries/Mac/UnrealEditor-MatchmakingMatchmaker.dylib' was produced by Assemble Project BootIOS/ProjectPackage_12104250227703450680_Project and Build Editor BootIOS Mac/ProjectPackage_12104250227703450680_EditorBinaries
[info] [Cook BootIOS IOS] File '.uet/tmp/Project12104250227703450680/Plugins/P/Binaries/Mac/UnrealEditor-MatchmakingTests.dylib' was produced by Assemble Project BootIOS/ProjectPackage_12104250227703450680_Project and Build Editor BootIOS Mac/ProjectPackage_12104250227703450680_EditorBinaries

The issue is that the plugin gets built and packaged for a boot test, and assembled into the test project (which is both the test project + plugin including binaries).

Then, when "Build Editor BootIOS Mac" runs, it's rebuilding the plugin binaries and including them in the tagged output:

This results in both the "Assemble Project BootIOS" and "Build Editor BootIOS Mac" producing plugin binaries.

This doesn't seem to cause a build failure, but we should figure out a way to resolve this ambiguity (perhaps by marking the plugin as "precompiled" for the purposes of boot tests so that it is never rebuilt?)