RFR: 8326369: Add test to verify bimorphic inlining happens after morphism changes [v5]

[Galder Zamarreño]

> This issue was fixed by JDK-8339299 indirectly (see [PR](https://github.com/openjdk/jdk/pull/20786)), but the PR for 8339299 didn't include any new tests, so I'm sending this PR with the test that Filipp added in 8326369 so that such issue doesn't come back inadvertently. I've added him as co-author and applied some small formatting changes.

Galder Zamarreño 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 eight additional commits since the last revision:

 - Merge branch 'master' into topic.bimorphic-inlining
 - Update test/hotspot/jtreg/compiler/inlining/InlineBimorphicVirtualCallAfterMorphismChanged.java
   
   Co-authored-by: Tobias Hartmann <tobias.hartmann at oracle.com>
 - Added Jetbrains copyright
 - Added copyright and @bug identifiers
 - Fix formatting
 - Fix more formatting issues
 - Fix formatting
 - Add test that replicates issue
   
   Co-authored-by:  Filipp Zhinkin <fzhinkin at openjdk.org>

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21920/files
  - new: https://git.openjdk.org/jdk/pull/21920/files/9945e03b..42152a1f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21920&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21920&range=03-04

  Stats: 121452 lines in 3119 files changed: 37834 ins; 72764 del; 10854 mod
  Patch: https://git.openjdk.org/jdk/pull/21920.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21920/head:pull/21920

PR: https://git.openjdk.org/jdk/pull/21920