RFR: 8362564: hotspot/jtreg/compiler/c2/TestLWLockingCodeGen.java fails on static JDK on x86_64 with AVX instruction extensions [v2]

[Jiangli Zhou]

> Please review this fix that increases the x86 initial stubs size to `21000` for `NOT_PRODUCT` only case.
> 
> Also included as part of the PR (suggested by @rasbold), moved the assert to after the `stubs` log info output.

Jiangli Zhou has updated the pull request incrementally with one additional commit since the last revision:

  Address @eastig review comment:
  - Reverted change for moving the assert. Added code_size, buffer size and free to the assert output.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/26395/files
  - new: https://git.openjdk.org/jdk/pull/26395/files/3cfac836..476c56d1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26395&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26395&range=00-01

  Stats: 9 lines in 1 file changed: 5 ins; 4 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/26395.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26395/head:pull/26395

PR: https://git.openjdk.org/jdk/pull/26395