minifier: turn off pure annotations

[Boshen]

rolldown/rolldown#3753

[IWANABETHATGUY]

supplement, treeshake.annotation in rollup includes both @__PURE__, @__NO_SIDE_EFFECTS__ https://rollupjs.org/configuration-options/#treeshake-annotations

[Boshen]

Going through Rolldown's SideEffectDetector and Rollup's treeshake configuration, oxc's side effect detector should also include

• https://rollupjs.org/configuration-options/#treeshake-manualpurefunctions
• https://rollupjs.org/configuration-options/#treeshake-unknownglobalsideeffects

So we can eventually merge the two implementations and provide a unified functionality.