Fix: Dropdown(#17039) Virtual Scroll Bug

[mark7p]

Closes #16868, closes #16991, closes #17007, closes #17031, closes #17039

Problem: The bug was introduced by #16979

if (simpleChanges.items) {
    this.setSpacerSize();
    this.setSize();
    this.cd.detectChanges();
}

Solution: Removed and fixed props update sequence for height and width.

[vercel]

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Name	Status	Preview	Updated (UTC)
primeng-v17	⬜️ Ignored (Inspect)	Visit Preview	Dec 16, 2024 10:34pm

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[mark7p]

please see new PR #17077