added various std traits for `PyBackedStr` and `PyBackedBytes` #9220

Job	Run time
fmt	28s
semver-checks	29s
check-msrv	11m 48s
clippy/aarch64-apple-darwin/stable	10m 3s
python${{ matrix.python-version }}-${{ matrix.platform.python-architecture }} ${{ matrix.platform.os }} rust-${{ matrix.rust }}	0s
careful	0s
clippy/x86_64-unknown-linux-gnu/stable	13m 41s
coverage windows-latest	8s
clippy/powerpc64le-unknown-linux-gnu/stable	13m 26s
coverage macos-14	5s
clippy/s390x-unknown-linux-gnu/stable	13m 26s
test-debug	11m 12s
coverage ubuntu-latest	15m 58s
clippy/wasm32-wasi/stable	12m 55s
valgrind	0s
clippy/x86_64-pc-windows-msvc/stable	18m 42s
clippy/i686-pc-windows-msvc/stable	17m 54s
check-feature-powerset	0s
docsrs	0s
clippy/x86_64-unknown-linux-gnu/beta	11m 33s
emscripten	0s
test-version-limits	0s
test-cross-compilation ${{ matrix.os }} -> ${{ matrix.target }}	0s
test-cross-compilation-windows	0s
python3.12-x64 macos-13 rust-stable / build	8m 56s
python3.12-x64 ubuntu-latest rust-stable / build	7m 48s
python3.12-x64 windows-latest rust-stable / build	12m 4s
python3.12-x86 windows-latest rust-stable / build	10m 53s
python3.12-arm64 macos-14 rust-stable / build	5m 9s
python3.12-x64 ubuntu-latest rust-nightly / build	7m 34s
conclusion	1s
	3h 24m 13s

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