Memory leak in Python target fixed #1512

Job	Run time
build-rti / run (ubuntu-latest)	6s
build-rti / run (macos-latest)	1m 44s
build-rti / run (windows-latest)	31s
unit-tests-multi / run (ubuntu-latest)	7s
unit-tests-multi / run (macos-latest)	22s
unit-tests-multi / run (windows-latest)	3m 49s
fetch-lf / extract-ref	3s
unit-tests-single / run (ubuntu-latest)	16s
unit-tests-single / run (macos-latest)	27s
unit-tests-single / run (windows-latest)	1m 7s
lf-default / regular-tests (ubuntu-latest)	29m 1s
lf-default / regular-tests (macos-latest)	1h 1m 1s
lf-default / regular-tests (windows-latest)	2h 16m 6s
lf-default-arduino / arduino-tests (ubuntu-latest)	3m 43s
lf-default-arduino / arduino-tests (macos-latest)	5m 13s
lf-adaptive / regular-tests (ubuntu-latest)	24m 44s
lf-adaptive / regular-tests (macos-latest)	1h 5m 20s
lf-adaptive / regular-tests (windows-latest)	1h 40m 53s
lf-default-zephyr / zephyr-tests	9m 27s
lf-gedf-np-ci / regular-tests (ubuntu-latest)	28m 52s
lf-gedf-np-ci / regular-tests (macos-latest)	59m 41s
lf-gedf-np-ci / regular-tests (windows-latest)	1h 39m 56s
lf-gedf-np / regular-tests (ubuntu-latest)	24m 47s
lf-gedf-np / regular-tests (macos-latest)	57m 32s
lf-gedf-np / regular-tests (windows-latest)	2h 0m 42s
	13h 55m 30s

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