[#490] Enable loan_slice APIs in CXX bindings #1818

Job	Run time
changes	4s
preflight-check	10s
linting-markdown	21s
static-code-analysis-cpp	1m 16s
cargo-nextest (windows-latest)	28s
static-code-analysis-rust (windows-latest)	6m 34s
cargo-nextest (ubuntu-latest)	15s
static-code-analysis-rust (ubuntu-latest)	3m 10s
cargo-nextest (macos-latest)	13s
static-code-analysis-rust (macOS-latest)	1m 56s
static-code-analysis	0s
x86_64	0s
x86_32	0s
freebsd	0s
x86_64_unstable	0s
grcov	0s
x86_64_bazel	0s
coverage	0s
	14m 27s

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