fix(files_external): add back js config files

[skjnldsv]

Seems I cleaned up too much in 38480fd
The settings still have their own legacy handlings

server/apps/files_external/lib/Lib/FrontendDefinitionTrait.php

Lines 75 to 89 in 9319bbb

	/**
	* @return string[]
	*/
	public function getCustomJs(): array {
	return $this->customJs;
	}
	/**
	* @param string $custom
	* @return self
	*/
	public function addCustomJs(string $custom): self {
	$this->customJs[] = $custom;
	return $this;
	}

server/apps/files_external/lib/Lib/Auth/OAuth1/OAuth1.php

Line 50 in 215aef3

->addCustomJs('oauth1')

server/apps/files_external/lib/Lib/Auth/OAuth2/OAuth2.php

Line 48 in 215aef3

->addCustomJs('oauth2')

server/apps/files_external/lib/Lib/Auth/PublicKey/RSA.php

Line 55 in 5e31ed4

->addCustomJs('public_key')

Fix #42158

[skjnldsv]

/backport to stable28

[emoral435]

Okay, I see what happened! LGTM!

[szaimen]

🐘