8233913: Remove implicit conversion from Method* to methodHandle Summary: Fix call sites to use existing THREAD local or pass down THREAD local for shallower callsites. Make linkResolver methods return Method* for caller to handleize if needed. Reviewed-by: iklam, thartmann, hseigel

/build/
/dist/
/.idea/
nbproject/private/
/webrev
/.src-rev
/.jib/
.DS_Store
.metadata/
.recommenders/
test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
**/JTreport/**
**/JTwork/**