[#490] Enable loan_slice APIs in CXX bindings #1801

Job	Run time
changes	4s
preflight-check	9s
linting-markdown	0s
static-code-analysis-cpp	1m 13s
static-code-analysis-rust (windows-latest)	50s
cargo-nextest (windows-latest)	39s
static-code-analysis-rust (ubuntu-latest)	50s
cargo-nextest (ubuntu-latest)	16s
static-code-analysis-rust (macOS-latest)	54s
cargo-nextest (macos-latest)	15s
static-code-analysis	0s
freebsd	0s
grcov	0s
x86_32	0s
x86_64	0s
x86_64_bazel	0s
x86_64_unstable	0s
coverage	0s
	5m 10s

Provide feedback