contractcourt: add HtlcBlobs to taprootBriefcase

In this commit, we add the set of HtlcBlobs to the taprootBriefcase
struct. This new field will store all the resolution blobs for a given
HTLC. We also add some new property based tests along the way for
adequate test coverage.

contractcourt/testdata/rapid/TestHtlcAuxBlobEncodeDecode/TestHtlcAuxBlobEncodeDecode-20240902140253-81338.fail

@@ -0,0 +1,78 @@
+# 2024/09/02 14:02:53.354676 [TestHtlcAuxBlobEncodeDecode] [rapid] draw htlcAuxBlobs: contractcourt.htlcAuxBlobs{contractcourt.resolverID{0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}:[]uint8{}}
+# 
+v0.4.8#15807814492030881602
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