PerformanceMonitoring: First batch of cmake, flake8, clean-up updates

This relates to ATEAM-678. The original goal was to enable flake8 for the packages under Control/PerformanceMonitoring. While doing so, I tried to clean things up that I'm fairly certain not used and/or needed anymore, although I played it safe. I also went through the cmake configurations, fixed a number of py3 problems in some scripts that are not used very frequently etc. It turned out to be a bit more massive MR than I was intending but pretty much all changes are either stylistic and/or uncontroversial. There is essentially no new functionality.

BTW, there are a few commits but it would be nice if we don't squash them just in case.

This merge request affects 4 packages:

• Control/PerformanceMonitoring/PerfMonAna
• Control/PerformanceMonitoring/PerfMonEvent
• Control/PerformanceMonitoring/PerfMonGPerfTools
• Control/PerformanceMonitoring/PerfMonVTune

Affected files list will not be printed in this case

Adding @amete ,@ssnyder as watchers

added Core master review-pending-level-1 labels

added 1 commit

• cde11f98 - PerfMonAna: Bug-fix in pmontree.py

Compare with previous version

build area is cleaned as the previous build was for the MR labeled as full-build

This merge request affects 4 packages:

• Control/PerformanceMonitoring/PerfMonAna
• Control/PerformanceMonitoring/PerfMonEvent
• Control/PerformanceMonitoring/PerfMonGPerfTools
• Control/PerformanceMonitoring/PerfMonVTune

Affected files list will not be printed in this case

Adding @amete ,@ssnyder as watchers

CI Result SUCCESS (hash 2a1a6d6b)

	Athena	AthSimulation	AthGeneration	AnalysisBase
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 24610]

CI Result SUCCESS (hash cde11f98)

	Athena	AthSimulation	AthGeneration	AnalysisBase
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 24612]

added review-pending-level-2 label and removed review-pending-level-1 label

resolved all threads

resolved all threads

Looks good and as described, thanks

L2

added review-approved label

removed review-pending-level-2 label

mentioned in merge request !39028 (merged)

mentioned in commit 95df2e0b

merged

added sweep:ignore label

mentioned in merge request !39165 (merged)