Beginning with Svelte version 3.54.0, the bind for function has stopped working according to the documentation and with the previous behavior

[lukaszpolowczyk]

Describe the bug

As of Svelte version 3.54.0, bind for function has stopped working according to the documentation and with the previous behavior.

The culprit is probably this:
Prevent running init binding unnecessarily (#5689, #6298)
(that's my guess)

---

Here a description of how bind for function works:
https://svelte.dev/docs#component-format-script-1-export-creates-a-component-prop

If you export a const, class or function, it is readonly from outside the component. Functions are valid prop values, however, as shown below.

<script>
	// these are readonly
	export const thisIs = 'readonly';

	export function greet(name) {
		alert(`hello ${name}!`);
	}

	// this is a prop
	export let format = n => n.toFixed(2);
</script>

As of Svelte version 3.54.0, it stopped working this way:
https://svelte.dev/repl/6dbad854b4ac4127a0797fd2dd99cd38?version=3.54.0

Still in Svelte version 3.53.1, it worked as in the documentation:
https://svelte.dev/repl/6dbad854b4ac4127a0797fd2dd99cd38?version=3.53.1

The latest version of Svelte 3.55.0 is also broken:
https://svelte.dev/repl/6dbad854b4ac4127a0797fd2dd99cd38?version=3.55.0

Reproduction

1. go to https://svelte.dev/repl/6dbad854b4ac4127a0797fd2dd99cd38?version=3.54.0
2. click Hello world!
3. see in the console (INCORRECT SVELTE WORKING):

    "outside1"
    "outside2"

1. go to https://svelte.dev/repl/6dbad854b4ac4127a0797fd2dd99cd38?version=3.53.1
2. click Hello world!
3. see in the console (CORRECT SVELTE WORKING):

    "inside"

---

Test code in REPL (common):

<!-- App.svelte -->
<script>
	import Com from "./Com.svelte"
	let name = 'world';
	let ee = ()=>{console.log("outside1")}
	let ee2 = ()=>{console.log("outside2")}
</script>

<Com bind:ee={ee}/>
<Com bind:ee={ee2}/>
<h1 on:click={()=>{ee();ee2();}}>Hello {name}!</h1>

<!-- Com.svelte -->
<script>
	export function ee () {console.log("inside")}
</script>

Logs

No response

System Info

System:
    OS: Linux 6.0 Arch Linux
    CPU: (4) x64 AMD Athlon(tm) X4 950 Quad Core Processor
    Memory: 9.63 GB / 15.06 GB
    Container: Yes
    Shell: 5.1.16 - /bin/bash
  Binaries:
    Node: 19.3.0 - /usr/bin/node
    Yarn: 1.22.19 - /usr/bin/yarn
    npm: 8.19.2 - /usr/bin/npm
  Browsers:
    Firefox: 102.6.0esr
  npmPackages:
    svelte: ^3.54.0 => 3.55.0

Severity

blocking all usage of svelte

[Prinzhorn]

#8103 #8114