RFR: 8341138: Rename jtreg property docker.support as container.support [v2]

[Ramkumar Sunderbabu]

> The System property "docker.support" defined in VMProps gives a wrong impression that it is tied to docker alone. The property is common for any container runtime. Hence, it needs to be renamed as "container.support".
> 
> Positive Testing:
> tier1,tier2,tier3 - to check stability
> tier5 - to run container tests
> 
> Negative Testing:
> Ran the following groups in hosts where container is not present.
> open/test/hotspot/jtreg/containers/
> open/test/jdk/jdk/internal/platform/docker/
> open/test/jdk/jdk/internal/platform/cgroup/

Ramkumar Sunderbabu has updated the pull request incrementally with one additional commit since the last revision:

  addressing review comment

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/21423/files
  - new: https://git.openjdk.org/jdk/pull/21423/files/75001218..3e36b519

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=21423&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=21423&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/21423.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21423/head:pull/21423

PR: https://git.openjdk.org/jdk/pull/21423