Update PHP 8.4+ expectations for numeric-string being non-empty-string

Amp-Thread-ID: https://ampcode.com/threads/T-01a1ad71-9d5a-7120-9844-bfb0954d122f

Author: ondrejmirtes

tests/PHPStan/Analyser/nsrt/bcmath-number.php

@@ -186,7 +186,7 @@ public function bcVsNull(Number $a): void
 		assertType('*ERROR*', $a * $b);
 		assertType('*ERROR*', $a / $b);
 		assertType('*ERROR*', $a % $b);
-		assertType('non-empty-string&numeric-string', $a . $b);
+		assertType('numeric-string', $a . $b);
 		assertType('*ERROR*', $a ** $b);
 		assertType('*ERROR*', $a << $b);
 		assertType('*ERROR*', $a >> $b);

tests/PHPStan/Analyser/nsrt/bug-12393b-php84.php

@@ -13,7 +13,7 @@ class StringableFoo {
     // https://3v4l.org/nelJF#v8.4.6
     public function doFoo3(\BcMath\Number $foo): void {
         $this->foo = $foo;
-        assertType('non-empty-string&numeric-string', $this->foo);
+        assertType('numeric-string', $this->foo);
     }
 
     public function __toString(): string {