TrigMinBias: Fix configuration for Pixel SPs veto chains

Merged Krzysztof Ciesla requested to merge kciesla/athena:minbias_pixveto_fix into 23.0

This MR fixes configuration for MinBias chains using pixel veto, e.g. HLT_mb_sp_vpix15_hi_FgapAC3_L1RD0_FILLED. Due to the method how SPs counting chains are configured, the minimum number of Pixel and SCT SPs was mistakenly set for vpixNN chains. This MR also adds more debug messages for SPCountingHypoTool.

CC: @asmaga @kdomijan

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