RFR: 8275506: Rename allocated_on_stack to allocated_on_stack_or_embedded

[Leo Korinth]

In allocation.hpp, the name allocated_on_stack can be misleading, better rename the function to allocated_on_stack_or_embedded and it will match the name of the enum as a bonus.

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Commit messages:
 - 8275506: Rename allocated_on_stack to allocated_on_stack_or_embedded

Changes: https://git.openjdk.java.net/jdk/pull/6004/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6004&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8275506
  Stats: 16 lines in 6 files changed: 0 ins; 0 del; 16 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6004.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6004/head:pull/6004

PR: https://git.openjdk.java.net/jdk/pull/6004