Use Rust 1.88 during CI (#7902) #8517

Job	Run time
build-compiler (macos-14, 5.3.0, true, darwin-arm64, aarch64-apple-darwin)	5m 52s
build-compiler (ubuntu-24.04-arm, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, t...	6m 25s
build-compiler (ubuntu-24.04, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, linux...	4m 27s
build-compiler (macos-13, 5.3.0, true, darwin-x64, x86_64-apple-darwin)	12m 35s
build-compiler (windows-2022, 5.3.0, true, win32-x64, x86_64-pc-windows-gnu)	8m 16s
build-compiler (ubuntu-24.04, ocaml-variants.4.14.2+options,ocaml-option-static, linux-x64, x86_6...	4m 20s
pkg-pr-new	54s
api-docs	2m 23s
test-installation-npm (windows-2022)	33s
test-installation-npm (ubuntu-24.04-arm)	28s
test-integration-rewatch (ubuntu-24.04-arm)	51s
test-installation-npm (macos-13)	30s
test-installation-pnpm (macos-14)	23s
test-integration-rewatch (ubuntu-24.04)	49s
test-installation-npm (ubuntu-24.04)	22s
test-installation-pnpm (windows-2022)	36s
test-installation-pnpm (ubuntu-24.04-arm)	18s
test-installation-npm (macos-14)	21s
test-integration-rewatch (windows-2022)	1m 52s
test-installation-pnpm (macos-13)	23s
test-integration-rewatch (macos-13)	1m 50s
test-integration-rewatch (macos-14)	59s
test-installation-pnpm (ubuntu-24.04)	42s
publish	0s
	56m 9s

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