watch: fix infinite loop when passing --watch=true flag

[pulkit-30]

fix: #51159

code:

console.log("hello world!");

run with cmd: ./node --watch=true index.mjs

before:

pulkitgupta@Pulkits-MacBook-Air node % ./node --watch=true index.mjs
(node:26067) ExperimentalWarning: Watch mode is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:26068) ExperimentalWarning: Watch mode is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:26069) ExperimentalWarning: Watch mode is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:26070) ExperimentalWarning: Watch mode is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:26071) ExperimentalWarning: Watch mode is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:26072) ExperimentalWarning: Watch mode is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:26073) ExperimentalWarning: Watch mode is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:26074) ExperimentalWarning: Watch mode is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:26075) ExperimentalWarning: Watch mode is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:26076) ExperimentalWarning: Watch mode is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:26077) ExperimentalWarning: Watch mode is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
^C%   

now:

pulkitgupta@Pulkits-MacBook-Air node % ./node --watch=true index.mjs
(node:88235) ExperimentalWarning: Watch mode is an experimental feature and might change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
Hello world
Completed running 'index.mjs'

Note: watch-mode will be activated with --watch=false flag as well

[nodejs-github-bot]

Review requested:

• @nodejs/test_runner

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/56303/

[nodejs-github-bot]

CI: https://ci.nodejs.org/job/node-test-pull-request/56318/

[nodejs-github-bot]

Landed in 154afbe