RFR: 8357514: Disable AOT caching for runtime stubs [v2]

[Vladimir Kozlov]

> After [JDK-8354887](https://bugs.openjdk.org/browse/JDK-8354887) was integrated we hit strange failures which looks like memory stomps during our JCK testing of AOT new JEPs:
> 
> # Internal Error (/workspace/open/src/hotspot/share/opto/regmask.hpp:222), pid=4186624, tid=4186658
> # assert(_RM_UP[i] == 0) failed: _hwm too low: 5 regs at: 4
> 
> or
> 
> # Internal Error (/workspace/open/src/hotspot/share/opto/type.cpp:996), pid=2832821, tid=2832868
> # fatal error: meet not symmetric
> 
> or other strange issues during C2 compilation
> 
> After investigating (running tests in loop) I narrowed down the issue to AOT caching of C2 runtime stubs:
> 
> https://github.com/openjdk/jdk/blob/master/src/hotspot/share/opto/output.cpp#L3491
> 
> After internal discussion we decided disable all runtime stubs caching.
> There is no guarantee that we may not have issues with C1 stubs too.
> 
> I propose hard code AOTStubCaching flag to `false` value until the issue is solved.

Vladimir Kozlov has updated the pull request incrementally with one additional commit since the last revision:

  Address comment

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/25379/files
  - new: https://git.openjdk.org/jdk/pull/25379/files/a375393d..e238ffb1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=25379&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25379&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/25379.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25379/head:pull/25379

PR: https://git.openjdk.org/jdk/pull/25379