Allow OTA upgrade between ESP32_V4 and ESP32 release names

[Copilot]

The OTA compatibility check performs exact string matching on release names, which prevents upgrading between ESP32_V4 (IDF v4 builds) and ESP32 (newer IDF builds) even though they target identical hardware.

Changes

• wled00/wled_metadata.cpp
  • Added normalizeReleaseName() helper that strips a trailing _V4 suffix before comparison
  • Updated shouldAllowOTA() to fall back to normalized name comparison when exact match fails — OTA is allowed if normalized names match, blocked otherwise

"ESP32"    ↔ "ESP32_V4"    → allowed
"ESP32_8M" ↔ "ESP32_8M_V4" → allowed (generalizes to all _V4 variants)
"ESP32"    ↔ "ESP8266"     → blocked (different hardware, unaffected)

Original prompt

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This section details on the original issue you should resolve

<issue_title>Upgrade from ESP32_V4 to ESP32 should be allowed</issue_title>
<issue_description>The OTA upgrade check should have an exception to allow swapping between these two different release names</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Upgrade from ESP32_V4 to ESP32 should be allowed #5406

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