Improve instance calls in JIT optimized code

[zanderso]

Related to issue #36428

@alexmarkov identified that the OneArgCheckInlineCacheStub is hot in JIT optimized code coming from bytecode in a representative Flutter app running on Fuchsia. Improving the stub, or reorganizing instance calls in optimized code would presumably improve fps there.

@rmacnak-google @a-siva

[alexmarkov]

It looks like OneArgCheckInlineCache is only used in unoptimized code, and observatory profiler incorrectly shows that it is called from optimized code. Anyway, we have almost 15% ticks in OneArgCheckInlineCache, so it is worth looking at that stub.

[rmacnak-google]

Related: https://dart-review.googlesource.com/c/sdk/+/99705

[a-siva]

Can this issue be closed, rmacnak@ has landed some related CLs.

[a-siva]

I am going to close this as the original issue of ephemeral apps is not being worked on.