Update ComInterfaceGenerator to use collection expressions in IID creation

[jkoritzinsky]

Instead of using new ReadOnlySpan(new[] { bytes }), we should use collection expressions like in #93125 as they're cleaner and spec'd to have the behavior we desire.

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Issue Details

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Instead of using new ReadOnlySpan(new[] { bytes }), we should use collection expressions like in #93125 as they're cleaner and spec'd to have the behavior we desire.

Author:	jkoritzinsky
Assignees:	-
Labels:	area-System.Runtime.InteropServices, source-generator
Milestone:	9.0.0