[crac] RFR: 8364662: [CRaC] Process restore options in the common arguments parser [v2]

[Timofei Pushkin]

> Options for restore are now processed during the common VM arguments parsing stage.
> 
> Notable improvements compared to the old code:
> - Options from `-XX:Flags=<file>` and `-XX:VMOptionsFile=<file>` are now also considered
> - Option aliasing is now handled correctly
> 
> **Behavioral change**. If `CRaCIgnoreRestoreIfUnavailable` is true it is now not an error to specify non-restore-settable options on restore — these will just be omitted from forwarding to the restored JVM. This makes it possible to specify non-restore-settable to be used after a failed restore.

Timofei Pushkin has updated the pull request incrementally with two additional commits since the last revision:

 - Fix flag name comparison
 - Handle aliased restore-settable boolean options

-------------

Changes:
  - all: https://git.openjdk.org/crac/pull/258/files
  - new: https://git.openjdk.org/crac/pull/258/files/c59efa51..3a1080b3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=crac&pr=258&range=01
 - incr: https://webrevs.openjdk.org/?repo=crac&pr=258&range=00-01

  Stats: 57 lines in 2 files changed: 16 ins; 0 del; 41 mod
  Patch: https://git.openjdk.org/crac/pull/258.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/258/head:pull/258

PR: https://git.openjdk.org/crac/pull/258