Memory leak in Python target fixed #1495

Job	Run time
unit-tests-multi / run (ubuntu-latest)	12s
unit-tests-multi / run (macos-latest)	23s
unit-tests-multi / run (windows-latest)	2m 33s
build-rti / run (ubuntu-latest)	7s
build-rti / run (macos-latest)	23s
build-rti / run (windows-latest)	22s
fetch-lf / extract-ref	2s
unit-tests-single / run (ubuntu-latest)	6s
unit-tests-single / run (macos-latest)	21s
unit-tests-single / run (windows-latest)	1m 27s
lf-gedf-np / regular-tests (ubuntu-latest)	29m 14s
lf-gedf-np / regular-tests (macos-latest)	59m 18s
lf-gedf-np / regular-tests (windows-latest)	2h 11m 42s
lf-adaptive / regular-tests (ubuntu-latest)	28m 26s
lf-adaptive / regular-tests (macos-latest)	1h 6m 52s
lf-adaptive / regular-tests (windows-latest)	1h 14m 13s
lf-default-arduino / arduino-tests (ubuntu-latest)	4m 15s
lf-default-arduino / arduino-tests (macos-latest)	5m 21s
lf-default / regular-tests (ubuntu-latest)	29m 2s
lf-default / regular-tests (macos-latest)	1h 4m 0s
lf-default / regular-tests (windows-latest)	2h 9m 15s
lf-default-zephyr / zephyr-tests	1h 21m 0s
lf-gedf-np-ci / regular-tests (ubuntu-latest)	26m 41s
lf-gedf-np-ci / regular-tests (macos-latest)	1h 3m 52s
lf-gedf-np-ci / regular-tests (windows-latest)	1h 58m 59s
	15h 18m 6s

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