RFR: 8249834: java/util/ArrayList/Bug8146568.java and j/u/Vector/Bug8148174.java use @ignore w/o bug-id [v2]

[Bill Huang]

On Fri, 8 Jul 2022 21:53:45 GMT, Bill Huang <duke at openjdk.org> wrote:

>> Tests Bug8146568 and Bug8148174 were disabled for high memory consumption, over 17G. This is a task to re-enable these two tests by marking them as manual tests.
>
> Bill Huang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Added missing backslash in jdk/TEST.groups

Test group jdk_core_manual_no_input was run with no issues. Both two newly added tests were run and passed. The only one failed test in this group is a remote test and failure is expected on a local machine.
<img width="465" alt="Screen Shot 2022-07-13 at 11 07 37 AM" src="https://user-images.githubusercontent.com/107074300/178803546-119dbaee-1fdc-4f3f-ae45-8170bd3d5d07.png">

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PR: https://git.openjdk.org/jdk/pull/9404