RFR: 8370708: RISC-V: Add VerifyStackAtCalls [v5]

[Robbin Ehn]

> Hi, please consider.
> 
> Sanity tested and no issues with MAJIK t1 (with +VSC).
> 
> Thanks, Robbin

Robbin Ehn has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains six additional commits since the last revision:

 - Merge branch 'master' into vsc
 - Forgot fix format for VSAC
 - Fixed format
 - Label name
 - li->mv, format, space
 - Draft

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/28005/files
  - new: https://git.openjdk.org/jdk/pull/28005/files/0dfed06f..00bd0deb

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28005&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28005&range=03-04

  Stats: 5529 lines in 237 files changed: 2986 ins; 1718 del; 825 mod
  Patch: https://git.openjdk.org/jdk/pull/28005.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28005/head:pull/28005

PR: https://git.openjdk.org/jdk/pull/28005