RFR: 8352020: [CompileFramework] enable compilation for VectorAPI [v2]

[Emanuel Peter]

> During work on [JDK-8344942](https://bugs.openjdk.org/browse/JDK-8344942) I discovered that it is currently not possible to compile VectorAPI code because it is still in incubator mode and needs flag "--add-modules=jdk.incubator.vector" for "javac".
> 
> Also: "javac" can produce warnings, and that leads to issues like this: [JDK-8351998](https://bugs.openjdk.org/browse/JDK-8351998). We should allow such warnings, they are not compile failures.
> 
> Example:
> 
> javac --add-modules=jdk.incubator.vector Test.java
> warning: [incubating] using incubating module(s): jdk.incubator.vector
> 1 warning
> 
> 
> I added an example test as well.

Emanuel Peter has updated the pull request incrementally with one additional commit since the last revision:

  typo

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/24082/files
  - new: https://git.openjdk.org/jdk/pull/24082/files/3b9eb4ce..fb4cd1c2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=24082&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=24082&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/24082.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24082/head:pull/24082

PR: https://git.openjdk.org/jdk/pull/24082