RFR: 8366878: Improve flags of compiler/loopopts/superword/TestAlignVectorFuzzer.java [v2]

[Manuel Hässig]

> The test definitions of `TestAlignVectorFuzzer.java` all contain `printcompilation` directives. These are redundant and slow down the test execution of a test that already often times out. @eme64 also suggested adding a `compileonly` directive to one of the four tests.
> 
> Testing:
>  - [ ] Github Actions
>  - [ ] tier1 and stress testing (features `TestAlignVectorFuzzer.java`)

Manuel Hässig 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 three additional commits since the last revision:

 - Merge branch 'master' into JDK-8366878-align-fuzz-flags
 - Make compileonly a separate run
 - Fix flags

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/27122/files
  - new: https://git.openjdk.org/jdk/pull/27122/files/d2db1697..3aa62f9e

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27122&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27122&range=00-01

  Stats: 31883 lines in 1081 files changed: 16389 ins; 9354 del; 6140 mod
  Patch: https://git.openjdk.org/jdk/pull/27122.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27122/head:pull/27122

PR: https://git.openjdk.org/jdk/pull/27122