RFR: 8361492: [IR Framework] Has too restrictive regex for load and store [v2]

[Marc Chevalier]

> Improving store and load regexes + adding test. It's mostly an improve version of a fix I had to do in Valhalla where it was blocking (part of JDK-8361250, blocking JDK-8357785).
> 
> The new regex takes into account that classes can implement interfaces, nested classes, and various labels after the `@`. It should be more robust.
> 
> Thanks,
> Marc

Marc Chevalier has updated the pull request incrementally with one additional commit since the last revision:

  Mostly add spaces
  
  and rename, a bit

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/26269/files
  - new: https://git.openjdk.org/jdk/pull/26269/files/70c8f867..3dc823cb

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26269&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26269&range=00-01

  Stats: 13 lines in 1 file changed: 0 ins; 0 del; 13 mod
  Patch: https://git.openjdk.org/jdk/pull/26269.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26269/head:pull/26269

PR: https://git.openjdk.org/jdk/pull/26269