[jdk11u-dev] RFR: 8294402: Add diagnostic logging to VMProps.checkDockerSupport [v2]

[Amos Shi]

> Backport of [JDK-8294402](https://bugs.openjdk.org/browse/JDK-8294402)
> 
> Clean vs Unclean Backport
> - Unclean Backport because we have manually edited the file `test/jtreg-ext/requires/VMProps.java`
>   - The `Copyright year` line are conflicting. Manually merged.
>   - `log("Entering dockerSupport()")` base line are different. Manually merged.
>   - This file can be considered as `Clean backport`
> - Well the system added the `clean` label
> 
> Tests
> - PR: All checks have passed
> - SAP nightlies passed on 2023-12-19

Amos Shi has updated the pull request incrementally with one additional commit since the last revision:

  8294402 Manually edit VMProps.java for year line

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

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/2390/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/2390/files/1df01593..e9670e49

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2390&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2390&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2390.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2390/head:pull/2390

PR: https://git.openjdk.org/jdk11u-dev/pull/2390