FindFirstMigration: use ifPresent when stream element type is primitive and the final statement is an assignment

This case is possible only if we have no non-final locals updated in the loop, so the assignment updates field or array element.
Using common assignment scenario may not work as primitive optionals lack map/filter operations
Fixes IDEA-200209 "Replace with findFirst" produces incompilable code

DfaBoxedValue now reports type when possible

it can be quite expensive, e.g. DaemonProgressIndicator#toString in tests contains a stack trace

# Conflicts:
#	plugins/terminal/src/org/jetbrains/plugins/terminal/JBTabInnerTerminalWidget.java

Update resolve so import sources don't resolve to inline package if stub package is not partial (PY-30942)