fix finding binaries in the PKGX_PANTRY_DIR #1957

Job	Run time
clippy (ubuntu-latest)	2m 1s
clippy (macos-latest)	1m 9s
clippy (windows-latest)	2m 17s
fmt	17s
coverage-integration (ubuntu-latest)	9m 17s
test (ubuntu-latest)	2m 17s
coverage-unit (windows-latest)	3m 22s
coverage-unit (ubuntu-latest)	2m 42s
test (macos-latest)	1m 42s
coverage-integration (macos-latest)	3m 51s
test-minimal-container	2m 36s
coverage-unit (macos-latest)	1m 58s
upload-coverage	3s
	33m 32s

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