[#490] Enable loan_slice APIs in CXX bindings #1809

Job	Run time
changes	3s
linting-markdown	17s
preflight-check	9s
cargo-nextest (windows-latest)	35s
static-code-analysis-cpp	1m 29s
cargo-nextest (ubuntu-latest)	21s
static-code-analysis-rust (windows-latest)	7m 19s
cargo-nextest (macos-latest)	13s
static-code-analysis-rust (ubuntu-latest)	3m 12s
static-code-analysis-rust (macOS-latest)	1m 59s
static-code-analysis	0s
freebsd	0s
x86_64	0s
grcov	0s
x86_32	0s
x86_64_bazel	0s
x86_64_unstable	0s
coverage	0s
	15m 37s

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