Check if we are setting jdkDate correctly for both types of JDK implementations

[smlambert]

We parse the contents of the output of java -version to set jdkDate (which is meant to indicate build date as opposed to some future release date) in this block of code: https://github.com/adoptium/aqa-test-tools/blob/master/TestResultSummaryService/parsers/Parser.js#L12-L33

Output from java -version is quite different depending on what jdk implementation is used.

hotspot impls look like:

16:38:54  =JAVA VERSION OUTPUT BEGIN=
16:38:54  openjdk version "21.0.4-beta" 2024-07-16
16:38:54  OpenJDK Runtime Environment Temurin-21.0.4+6-202406261902 (build 21.0.4-beta+6-ea)
16:38:54  OpenJDK 64-Bit Server VM Temurin-21.0.4+6-202406261902 (build 21.0.4-beta+6-ea, mixed mode, sharing)
16:38:54  =JAVA VERSION OUTPUT END=

openj9 impls look like:

11:53:15  =JAVA VERSION OUTPUT BEGIN=
11:53:19  openjdk version "11.0.24-internal" 2024-07-16
11:53:19  OpenJDK Runtime Environment (build 11.0.24-internal+0-adhoc.jenkins.BuildJDK11aarch64macPersonal)
11:53:19  Eclipse OpenJ9 VM (build master-2a2df9f1117, JRE 11 Mac OS X aarch64-64-Bit 20240627_514 (JIT enabled, AOT enabled)
11:53:19  OpenJ9   - 2a2df9f1117
11:53:19  OMR      - 47a9d248db0
11:53:19  JCL      - c535515f053 based on jdk-11.0.24+6)
11:53:19  =JAVA VERSION OUTPUT END=

See related comments after https://github.com/adoptium/temurin-build/issues/1456#issuecomment-2194653259