[MG_Backend] (P7): the image-flags decline's comment says it was one of five Shape* exits with no shipped line, not the one

Fable review of the B3 rework, nit: the comment over the ShapeImageFlags-
Unsupported site called it "the one Shape* exit that left no line on the
builds that ship". At 0d425499 SyncWireTextureShape had five such exits:
ViewOf (bare return false), NoLevels (bare return false), preserve-flush
(bare return false), image flags (MGLOG_D, compiled away in Release) and
preserve-copy (bare return false). The comment now names all five.

Comment-only, inside the disaggregated-only SyncWireTextureShape; pull
build unaffected.

MobileGL/MG_Backend/DirectVulkan/Renderer/VkTextureManager.cpp

@@ -2315,8 +2315,9 @@ namespace MobileGL::MG_Backend::DirectVulkan {
             }
             if (imageFormatResult != VK_SUCCESS ||
                 (isMultisample && (imageFormatProperties.sampleCounts & resolvedSampleCount) == 0)) {
-                // Was an MGLOG_D, which a Release build compiles away: the one Shape* exit that
-                // left no line on the builds that ship.
+                // Was an MGLOG_D, which a Release build compiles away, so on the builds that ship
+                // this exit left no line - one of five Shape* exits that did (with ViewOf,
+                // NoLevels, preserve-flush and preserve-copy) before B3's review round.
                 MGL_WIRE_DECLINE_AT(ShapeImageFlagsUnsupported,
                                     "texture {slot=%u, gen=%u}: image flags=0x%x sampleCount=%d are unsupported "
                                     "by the device",