RFR: 8307315: Missing ResourceMark in CDS and JVMTI code [v3]

[Calvin Cheung]

> Please review this simple fix for adding a missing `ResourceMark` in `KlassFactory::check_shared_class_file_load_hook` which is a common caller of `FileMapInfo::open_stream_for_jvmti` and `JvmtiClassFileLoadHookPoster::post_to_env `(indirectly via `JvmtiExport::post_class_file_load_hook`).
> 
> Passed tiers 1 - 3 testing.

Calvin Cheung has updated the pull request incrementally with one additional commit since the last revision:

  relocate the comment

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Changes:
  - all: https://git.openjdk.org/jdk/pull/13992/files
  - new: https://git.openjdk.org/jdk/pull/13992/files/dd01033f..0f457087

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13992&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13992&range=01-02

  Stats: 2 lines in 2 files changed: 1 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/13992.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/13992/head:pull/13992

PR: https://git.openjdk.org/jdk/pull/13992