Adjust Grinder link to properly rerun with 0 iterations and always rerun with parallel=none

[jiekang]

Fixes: #4830

This adjusts the code when generating grinder link parameters to:

• always rerun with 0 iterations
• never use lightweight checkouts
• always use no parallelization

with slightly refactored code that should be easier to read.

[sophia-guo]

Grinder - RERUN_ITERATIONS=1, PARALLEL=dynamic https://ci.adoptium.net/job/Grinder/12128/

generated rerun links with RERUN_ITERATIONS=0 PARALLEL=None, LIGHT_WEIGHT_CHECKOUT=false as expected.

Rerun in Grinder Change TARGET to run only the failed test targets.
Rerun in Grinder on same machine Change TARGET to run only the failed test targets. For dynamic vm agents as they are created at runtime and quickly recycled, it may not be possible to rerun on the same agent.
Rerun in Grinder with failed test targets
Rerun failed jdk test cases in Grinder with jdk_custom target, rerun failed test link, rerun jdk_custom link a