Move VectorStream to a new YaBStream

We'll have to extend this with `IStreamAttributes` for VST 3.6.0 preset
meta data.

src/common/serialization/vst3/base.h

@@ -22,7 +22,6 @@
 
 #include <pluginterfaces/base/ftypes.h>
 #include <pluginterfaces/base/funknown.h>
-#include <pluginterfaces/base/ibstream.h>
 #include <pluginterfaces/vst/vsttypes.h>
 
 // Yet Another layer of includes, but these are some VST3-specific typedefs that
@@ -165,67 +164,3 @@ class UniversalTResult {
 
     Value universal_result;
 };
-
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wnon-virtual-dtor"
-
-/**
- * Serialize an `IBStream` into an `std::vector<uint8_t>`, and allow the
- * receiving side to use it as an `IBStream` again. `ISizeableStream` is defined
- * but then for whatever reason never used, but we'll implement it anyways.
- */
-class VectorStream : public Steinberg::IBStream,
-                     public Steinberg::ISizeableStream {
-   public:
-    VectorStream();
-
-    /**
-     * Read an existing stream.
-     *
-     * @throw std::runtime_error If we couldn't read from the stream.
-     */
-    VectorStream(Steinberg::IBStream* stream);
-
-    virtual ~VectorStream();
-
-    DECLARE_FUNKNOWN_METHODS
-
-    /**
-     * Write the vector buffer back to an IBStream. After writing the seek
-     * position will be left at the end of the stream.
-     */
-    tresult write_back(Steinberg::IBStream* stream) const;
-
-    /**
-     * Return the buffer's, used in the logging messages.
-     */
-    size_t size() const;
-
-    // From `IBstream`
-    tresult PLUGIN_API read(void* buffer,
-                            int32 numBytes,
-                            int32* numBytesRead = nullptr) override;
-    tresult PLUGIN_API write(void* buffer,
-                             int32 numBytes,
-                             int32* numBytesWritten = nullptr) override;
-    tresult PLUGIN_API seek(int64 pos,
-                            int32 mode,
-                            int64* result = nullptr) override;
-    tresult PLUGIN_API tell(int64* pos) override;
-
-    // From `ISizeableStream`
-    tresult PLUGIN_API getStreamSize(int64& size) override;
-    tresult PLUGIN_API setStreamSize(int64 size) override;
-
-    template <typename S>
-    void serialize(S& s) {
-        s.container1b(buffer, max_vector_stream_size);
-        // The seek position should always be initialized at 0
-    }
-
-   private:
-    std::vector<uint8_t> buffer;
-    size_t seek_position = 0;
-};
-
-#pragma GCC diagnostic pop