RFR: 8326369: Add test to verify bimorphic inlining happens after morphism changes [v4]

[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 incrementally with one additional commit since the last revision:

  Update test/hotspot/jtreg/compiler/inlining/InlineBimorphicVirtualCallAfterMorphismChanged.java
  
  Co-authored-by: Tobias Hartmann <tobias.hartmann at oracle.com>

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Changes:
  - all: https://git.openjdk.org/jdk/pull/21920/files
  - new: https://git.openjdk.org/jdk/pull/21920/files/9d9909f8..9945e03b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21920&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21920&range=02-03

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 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