[crac] RFR: 8368929: [CRaC] Move CPUFeatures check to C/R engine [v7]

[Radim Vansa]

> Right now the logic checking if CPU features used before checkpoint match current CPU features is in VM code. VM stores and retrieves CPU features through C/R API's user_data extension. This is convenient when we have a single image that can be either accepted or rejected, but does not offer the flexibility for C/R engine to select the best image for current execution environment.
> 
> The goal of this issue is to move to a declarative API that will express the requirements using more abstract means, labels (for CPU architecture) and bitmaps (for CPU features).

Radim Vansa has updated the pull request incrementally with two additional commits since the last revision:

 - Fixup
 - Review update

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Changes:
  - all: https://git.openjdk.org/crac/pull/266/files
  - new: https://git.openjdk.org/crac/pull/266/files/e0e399f7..55c50f21

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=crac&pr=266&range=06
 - incr: https://webrevs.openjdk.org/?repo=crac&pr=266&range=05-06

  Stats: 418 lines in 21 files changed: 163 ins; 95 del; 160 mod
  Patch: https://git.openjdk.org/crac/pull/266.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/266/head:pull/266

PR: https://git.openjdk.org/crac/pull/266