Link to "Rerun in Grinder" doesn't work as expected

For example, in https://openj9-jenkins.osuosl.org/job/Test_openjdk8_j9_sanity.functional_s390x_linux_Personal_testList_1/302/console you'll see:
```
17:31:16 Rerun in Grinder: https://openj9-jenkins.osuosl.org/job/Grinder/parambuild/?SDK_RESOURCE=customized&TARGET=-f+parallelList.mk+testList_1&BASE_DOCKER_REGISTRY_CREDENTIAL_ID=&TEST_FLAG=&UPSTREAM_TEST_JOB_NAME=Test_openjdk8_j9_sanity.functional_s390x_linux_Personal&DOCKER_REQUIRED=false&ACTIVE_NODE_TIMEOUT=&VENDOR_TEST_DIRS=&EXTRA_DOCKER_ARGS=&TKG_OWNER_BRANCH=adoptium%3Amaster&OPENJ9_SYSTEMTEST_OWNER_BRANCH=eclipse%3Amaster&PLATFORM=s390x_linux&GENERATE_JOBS=true&KEEP_REPORTDIR=false&PERSONAL_BUILD=false&DOCKER_REGISTRY_DIR=&ADOPTOPENJDK_REPO=https%3A%2F%2Fgithub.com%2Fadoptium%2Faqa-tests.git&RERUN_ITERATIONS=0&SETUP_JCK_RUN=false&DOCKER_REGISTRY_URL_CREDENTIAL_ID=&LABEL=&EXTRA_OPTIONS=&BUILD_IDENTIFIER=ibmruntimes%2Fopenj9-openjdk-jdk8%23752&CUSTOMIZED_SDK_URL=https%3A%2F%2Fopenj9-artifactory.osuosl.org%2Fartifactory%2Fci-openj9%2FBuild_JDK8_s390x_linux_Personal%2F738%2FOpenJ9-JDK8-s390x_linux-20240508-165446.tar.gz+https%3A%2F%2Fopenj9-artifactory.osuosl.org%2Fartifactory%2Fci-openj9%2FBuild_JDK8_s390x_linux_Personal%2F738%2Ftest-images.tar.gz&JENKINS_KEY=&ADOPTOPENJDK_BRANCH=master&LIGHT_WEIGHT_CHECKOUT=false&USE_JRE=false&ARTIFACTORY_SERVER=ci-eclipse-openj9&KEEP_WORKSPACE=false&USER_CREDENTIALS_ID=&JDK_VERSION=8&DOCKER_REGISTRY_URL=&ITERATIONS=1&VENDOR_TEST_REPOS=&JDK_REPO=https%3A%2F%2Fgithub.com%2Fibmruntimes%2Fopenj9-openjdk-jdk8.git&JCK_GIT_BRANCH=master&OPENJ9_BRANCH=master&OPENJ9_SHA=9eb718e0bc98098858f1181d7591255ab9385096&JCK_GIT_REPO=&VENDOR_TEST_BRANCHES=&OPENJ9_REPO=https%3A%2F%2Fgithub.com%2Feclipse-openj9%2Fopenj9.git&UPSTREAM_JOB_NAME=&CLOUD_PROVIDER=&CUSTOM_TARGET=&VENDOR_TEST_SHAS=&JDK_BRANCH=openj9&LABEL_ADDITION=&ARTIFACTORY_REPO=ci-openj9&ARTIFACTORY_ROOT_DIR=Test&UPSTREAM_TEST_JOB_NUMBER=312&DOCKERIMAGE_TAG=&JDK_IMPL=openj9&TEST_TIME=&SSH_AGENT_CREDENTIAL=&AUTO_DETECT=true&SLACK_CHANNEL=&DYNAMIC_COMPILE=true&RELATED_NODES=&ADOPTOPENJDK_SYSTEMTEST_OWNER_BRANCH=adoptium%3Amaster&APPLICATION_OPTIONS=&CUSTOMIZED_SDK_URL_CREDENTIAL_ID=e047f50a-26c4-4b82-8525-6da17ec68450&ARCHIVE_TEST_RESULTS=false&NUM_MACHINES=&OPENJDK_SHA=&TRSS_URL=&USE_TESTENV_PROPERTIES=false&BUILD_LIST=functional&ADDITIONAL_ARTIFACTS_REQUIRED=&UPSTREAM_JOB_NUMBER=&STF_OWNER_BRANCH=adoptium%3Amaster&TIME_LIMIT=10&JVM_OPTIONS=&PARALLEL=None
```
Following that link leads to the page to launch a grinder, but (at least) some of the parameters are ignored. The URL above says `PLATFORM=s390x_linux`, but the `PLATFORM` field contains `x86-64_linux`. I couldn't find any parameters that appeared to be taken from the "rerun in grinder" link.

Do I misunderstand the intent of specifying all those parameters in the URL?

Start by reproducing the linked test console output and opening its “Rerun in Grinder” URL. Trace how the URL parameters are generated and how the Grinder launch page reads them, then verify that values such as PLATFORM are reflected in the corresponding fields.

Written by the indexing model from the issue text.