JIT: fix return type mismatch inlining block

JIT: fix return type mismatch inlining block

If caller passes a directly substitutable expression whose
type is compatible with but not the same as the callee argument type,
and that argument is the callee's return value, the jit may
reject inlining the method because of a return type mismatch.

Fix is to retype the expressions we use in the callee's body
as the callee's type.

Closes dotnet/coreclr#11211.

Commit migrated from https://github.com/dotnet/coreclr/commit/7f8a620ea74dfb57e52320601addda68e2f53f53