[ci] Fix codeql build

[radical]

Avoid doing test specific tasks when not building to run tests.

Fixes #5738 .

Microsoft Reviewers: Open in CodeFlow

[radical]

Validation build - https://dev.azure.com/dnceng/internal/_build/results?buildId=2539843

[eerhardt]

Why are we building anything in the tests directory in this build configuration? If we don't want to do "test things", do we need to build the test assemblies?

[radical]

That's a good question. AFAICS, even if we have -p:Tests=false like used for the codeql build, it still builds the test assemblies because they are referenced from the sln.

[eerhardt]

I didn't think it uses the sln, but instead uses:

aspire/eng/Build.props

Lines 2 to 8 in a8b0bed

	<ItemGroup Condition="'$(DotNetBuildFromSource)' != 'true' and '$(DotNetBuild)' != 'true'">
	<ProjectToBuild Include="$(RepoRoot)src\**\*.csproj" Exclude="$(RepoRoot)src\Aspire.ProjectTemplates\templates\**\*.csproj" />
	<ProjectToBuild Include="$(RepoRoot)eng\dcppack\**\*.csproj" />
	<ProjectToBuild Include="$(RepoRoot)eng\dashboardpack\**\*.csproj" />
	<ProjectToBuild Include="$(RepoRoot)playground\**\*.csproj" />
	<ProjectToBuild Include="$(RepoRoot)tests\**\*.csproj" />
	</ItemGroup>

[radical]

Oh then we should definitely make building the tests conditional. I'll open an issue to track that work.

[radical]

@joperezr this needs a review.

[eerhardt]

This is good enough to unblock the codeql build. But I'd like to understand why we are building tests at all in that build.

[radical]

This is good enough to unblock the codeql build. But I'd like to understand why we are building tests at all in that build.

Opened this to track work to make building the tests conditional - #5769