Change timeouts for outerloop job and move one test to longRunningGc. (#24731)

Change timeouts for outerloop job and move one test to longRunningGc. (#24731)

* Change outerloop timeout per collection.

We have different test collections timeouts on Alpine.38.Amd64, examples:
https://mc.dot.net/#/user/coreclr-ci/ci~2Fdotnet~2Fcoreclr~2Frefs~2Fheads~2Fmaster/test~2Ffunctional~2Fcli~2F/20190521.780/workItem/JIT.jit64.hfa/wilogs
https://mc.dot.net/#/user/coreclr-ci/ci~2Fdotnet~2Fcoreclr~2Frefs~2Fheads~2Fmaster/test~2Ffunctional~2Fcli~2F/20190521.779/workItem/PayloadGroup0/wilogs
https://mc.dot.net/#/user/coreclr-ci/ci~2Fdotnet~2Fcoreclr~2Frefs~2Fheads~2Fmaster/test~2Ffunctional~2Fr2r~2Fcli~2F/20190521.783/workItem/Loader.classloader.TypeGeneratorTests.TypeGeneratorTest0-299/wilogs

* Move _il_relthread-race to pri1 and mark as long running GC test.