RFR: 8356075: Support Shenandoah GC in JVMCI

[Roman Kennke]

In order to support Shenandoah GC in Graal, some changes are required in JVMCI, namely, export Shenandoah relevant symbols.

Testing:
 - [x] extensive testing with https://github.com/oracle/graal/pull/10904

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Commit messages:
 - Fix ordering of includes
 - Remove unnecessary stuff
 - Revert unrelated changes
 - Revert unrelated changes
 - Merge branch 'master' into graal-shenandoah-support
 - Support for Shenandoah card-table barriers in JVMCI
 - Revert "8321373: Build should use LC_ALL=C.UTF-8"
 - Graal Shenandoah support

Changes: https://git.openjdk.org/jdk/pull/25001/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25001&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8356075
  Stats: 59 lines in 6 files changed: 58 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25001.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25001/head:pull/25001

PR: https://git.openjdk.org/jdk/pull/25001