refactor: replace canonicalization in search path retrieval with dedicated normalization function #1307

Job	Run time
Tests in Containers (ci-homebrew-container, ubuntu-latest, homebrew/brew, x86_64-unknown-linux-musl)	4m 3s
Tests (macos-14, aarch64-apple-darwin, yes)	13m 38s
Tests (windows-latest, x86_64-pc-windows-msvc, yes)	8m 4s
Tests in Containers (ci-jupyter-container, ubuntu-latest, mcr.microsoft.com/devcontainers/univers...	4m 42s
Tests (macos-latest, x86_64-apple-darwin, yes)	15m 37s
Env Tests (ci-poetry-global, ubuntu-latest, x86_64-unknown-linux-musl)	2m 50s
Env Tests (ci-poetry-custom, windows-latest, x86_64-pc-windows-msvc)	5m 38s
Builds (windows-latest, x86_64-pc-windows-msvc)	4m 51s
Builds (windows-latest, aarch64-pc-windows-msvc)	4m 31s
Env Tests (ci-poetry-global, windows-latest, x86_64-pc-windows-msvc)	5m 55s
Env Tests (ci-poetry-project, ubuntu-latest, x86_64-unknown-linux-musl)	2m 58s
Env Tests (ci-poetry-custom, ubuntu-latest, x86_64-unknown-linux-musl)	2m 52s
Builds (ubuntu-latest, x86_64-unknown-linux-musl, yes)	2m 18s
Env Tests (ci-poetry-project, windows-latest, x86_64-pc-windows-msvc)	6m 34s
Tests (ubuntu-latest, x86_64-unknown-linux-musl, yes)	9m 9s
Builds (macos-latest, x86_64-apple-darwin, yes)	4m 48s
Builds (macos-14, aarch64-apple-darwin, yes)	2m 55s
	1h 41m 23s

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