feat(plugin-asset): support `generator['asset'].experimentalLibPreserveImport` for Rslib #18223

Job	Run time
Check license of dependencies	8s
Check Source Changed	5s
Spell check	8s
Pnpm Lockfile Check	23s
Get Runner Labels / Get Runner Labels	1s
Test Release Mac	0s
Test Release Windows	0s
Test Release Linux	0s
Lint and format code	35s
Lint and format website	0s
Test Mac	0s
Rust Changes	4s
Test Linux / Build	9m 58s
Test Windows / Build	13m 6s
Rust test	3m 58s
Rust check	6m 35s
Rust test miri	0s
Check Rust Unused Dependencies	37s
Test Linux / Test Node 18	6m 43s
Test Linux / E2E Testing	1m 31s
Test Linux / Bench	2m 33s
Test Windows / Test Node 18	15m 6s
Test Windows / E2E Testing	0s
Test Windows / Bench	0s
Failure Notification	0s
	1h 1m 31s

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