GetBlocKList error response doesn't contain UTF-8 BOM characters especially if blob is not found

[rambabu-yalla]

ISSUE : The GetBlockList API error response does not include UTF-8 BOM characters when the blob is not found — this behavior is specific to Azurite. In contrast, the actual Azure Blob Storage service includes BOM characters in its error responses.

Azureite Version: Tested with latest Azurite.

Error response snippet - This is the output of db command under windbg

• 3c 3f 78 6d 6c 20 76 65-72 73 69 6f 6e 3d 22 31 <?xml version="1
• 2e 30 22 20 65 6e 63 6f-64 69 6e 67 3d 22 55 54 .0" encoding="UT
• 46 2d 38 22 20 73 74 61-6e 64 61 6c 6f 6e 65 3d F-8" standalone=
• 22 79 65 73 22 3f 3e 0a-3c 45 72 72 6f 72 3e 0a "yes"?>..
• 20 20 3c 43 6f 64 65 3e-42 6c 6f 62 4e 6f 74 46 BlobNotF
• 6f 75 6e 64 3c 2f 43 6f-64 65 3e 0a 20 20 3c 4d ound. <M
• 65 73 73 61 67 65 3e 54-68 65 20 73 70 65 63 69 essage>The speci
• 66 69 65 64 20 62 6c 6f-62 20 64 6f 65 73 20 6e fied blob does n

Expected response:

• ef bb bf 3c 3f 78 6d 6c-20 76 65 72 73 69 6f 6e ...<?xml version

[blueww]

@EmmaZhu

Would you please help to look at this issue?