RFR: 8370920: [s390] C2: add instruction size in s390.ad file [v8]

[Harshit470250]

> This pr adds the size of the match rule nodes.
> 
> There were a lot of nodes for which the size was variable, for those node I have taken the maximum possible size.

Harshit470250 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 18 additional commits since the last revision:

 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge branch 'openjdk:master' into master
 - Merge remote-tracking branch 'origin/master'
 - remove whitespace
 - Resolved a bug
 - ... and 8 more: https://git.openjdk.org/jdk/compare/c2cc62be...077d0258

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/28054/files
  - new: https://git.openjdk.org/jdk/pull/28054/files/b094f06d..077d0258

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28054&range=07
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28054&range=06-07

  Stats: 311 lines in 19 files changed: 234 ins; 25 del; 52 mod
  Patch: https://git.openjdk.org/jdk/pull/28054.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28054/head:pull/28054

PR: https://git.openjdk.org/jdk/pull/28054