[20.x backport] worker: add postMessageToThread#57101

ShogunPanda wants to merge 1 commit intonodejs:v20.x-stagingnodejs/node:v20.x-stagingfrom

ShogunPanda:post-message-to-thread-v20.xShogunPanda/node:post-message-to-thread-v20.xCopy head branch name to clipboard