Fix System.Runtime reference versions and several test project names under JIT/Methodical

[trylek]

For the project renames, the only goal was to establish the invariant that
"_il_d" and "_il_r" denote IL tests. For the System.Runtime reference, I don't have
any great idea what exactly's going on - without the changes merged build fails with

"System.Object is defined in an assembly that is not referenced, you must add a reference to System.Runtime"

In all cases except for "delegatetail.il" these tests are "special" in the sense that they qualify the System.Object
type with the [System.Runtime] instead of [mscorlib] assembly as the remaining tests do. I have no idea what
the compiler doesn't like about the delegatetail.il test.

All these recent changes I'm publishing contribute to the test consolidation task
(there are just about 2-3 more to go). Please let me know if you think that fixing the PKT
is not the right way to fix this, feel free to suggest a different solution.

Thanks

Tomas

/cc @dotnet/jit-contrib

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Issue Details

---

For the project renames, the only goal was to establish the invariant that
"_il_d" and "_il_r" denote IL tests. For the System.Runtime reference, I don't have
any great idea what exactly's going on - without the changes merged build fails with

"System.Object is defined in an assembly that is not referenced, you must add a reference to System.Runtime"

In all cases except for "delegatetail.il" these tests are "special" in the sense that they qualify the System.Object
type with the [System.Runtime] instead of [mscorlib] assembly as the remaining tests do. I have no idea what
the compiler doesn't like about the delegatetail.il test.

All these recent changes I'm publishing contribute to the test consolidation task
(there are just about 2-3 more to go). Please let me know if you think that fixing the PKT
is not the right way to fix this, feel free to suggest a different solution.

Thanks

Tomas

/cc @dotnet/jit-contrib

Author:	trylek
Assignees:	-
Labels:	area-Infrastructure-coreclr
Milestone:	7.0.0

[trylek]

/azp run runtime-coreclr outerloop

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[BruceForstall]

Did you try replacing all references to 'System.Runtime' with 'mscorlib' in IL tests? (Would that even be expected to work in all cases?)

[trylek]

@BruceForstall - I did not, perhaps it might also resolve the issue but I tried to avoid excessively churning the codebase by making bulky refactorings - there are about 2.5K occurrences of [System.Runtime]System.Object in the test tree today. I agree there's value in further cleanup but for now I believe it's most important to land the primary consolidation.