Update `CUSTOM_CYCLER` to have 10 line styles

[nemo794]

Issue

Currently, QA's CUSTOM_CYLER repeats line colors+line styles if there are more than 6 lines plotted.

As noted by @gshiroma , all GCOV QP data will be produced full covariance, so in e.g. the histogram plots there will 10 layers plotted and no way to differentiate certain layers. For example, in this plot, there's no way to differentiate HHHH from HHVV, or HVHV from HVVH:

Fix

QA's QA's CUSTOM_CYLER needs to be updated to support 10 distinct line styles.