Clean up sourcebuild tags in `sourcelink` dependencies

[NikolaMilosavljevic]

Contributes to #3439

We should remove sourcelink package dependencies in all repos except sdk (for repo flow).

We should ensure that each repo uses the SDK that contains sourcelink, as specified in the aforementioned issue. SourceBuild tag should be kept in repos that use older SDK. For each of those repos, an issue should be created, to ensure the tag is removed when SDK gets updated. For many repos dependency is not even used and SDK update isn't needed.

Repos:

• arcade - Remove sourcelink dependency arcade#13974
• cecil - Remove sourcelink dependency cecil#103
• command-line-api - blocked - requires 8.0 SDK - Remove sourcelink package dependency command-line-api#2264
• deployment-tools - Remove sourcelink dependency deployment-tools#287
• diagnostics - Remove sourcelink dependency diagnostics#4133
• emsdk - Remove sourcelink dependency emsdk#402
• format - Remove sourcelink dependency format#1932
• fsharp - Remove sourcelink dependency fsharp#15814
• installer - Remove unnecessary sourcelink dependency installer#17099
• msbuild - Remove sourcelink dependency msbuild#9105
• razor - Remove sourcelink dependency razor#9093
• roslyn - Remove sourcelink dependency roslyn#69397
• roslyn-analyzers - Remove sourcelink dependency roslyn-analyzers#6836
• source-build-reference-packages - Remove sourcelink dependency source-build-reference-packages#762
• sourcelink - Remove sourcelink dependency sourcelink#1084
• symreader - Remove sourcelink dependency symreader#295
• templating - Remove sourcelink dependency templating#6916
• test-templates - Remove sourcelink dependency test-templates#315
• vstest - Remove sourcelink dependency microsoft/vstest#4656
• xliff-tasks - Remove sourcelink dependency xliff-tasks#807

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[MichaelSimons]

I think the sourcelink dependency should be removed entirely except for in the SDK repo. It only exists because it was a transitive dependency from using arcade.