RFR: 8311248: Refactor CodeCache::initialize_heaps to simplify adding new CodeCache segments

[Boris Ulasevich]

The change simplifies the CodeCache::initialize_heaps segment memory split logic to make it easier to add new segments to the code cache:

  if (!non_nmethod_set && !profiled_set && !non_profiled_set) {
    ...
  } else if (!non_nmethod_set || !profiled_set || !non_profiled_set) {
    if (non_profiled_set) {
      if (!profiled_set) {
        ...
      }
    } else if (profiled_set) {
      ...
    } else if (non_nmethod_set) {
      ...
    }
  }


The existing layout is retained. With this change, PrintFlagsFinal always shows the actual segment sizes (not an intermediate value before alignment), and the segments always completely fill the ReservedCodeCacheSize (no wasted page due to final down alignment).

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

Commit messages:
 - test update
 - cleanup2
 - cleanup1
 - 8311248: Refactor CodeCache::initialize_heaps to simplify adding new CodeCache segments

Changes: https://git.openjdk.org/jdk/pull/17244/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17244&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8311248
  Stats: 361 lines in 5 files changed: 213 ins; 103 del; 45 mod
  Patch: https://git.openjdk.org/jdk/pull/17244.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17244/head:pull/17244

PR: https://git.openjdk.org/jdk/pull/17244