Some memory management cleanup in TrkAlignment

See title

This merge request affects 2 packages:

• Tracking/TrkAlignment/TrkAlignGenTools
• Tracking/TrkAlignment/TrkGlobalChi2AlignTools

Affected files list will not be printed in this case

Adding @amorley as watcher

added Tracking master review-pending-level-1 labels

CI Result SUCCESS (hash c138bae7)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
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
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 53912]

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

mentioned in commit 8be81528

merged

added sweep:ignore label