[BUG] Gst plugin kvssink is built as static library

[mateuszboryn]

Logging

cmake .. -DBUILD_GSTREAMER_PLUGIN=ON -DBUILD_STATIC=ON
...
make
...
ls *libgst*
libgstkvssink.a

Describe the bug
I would like to build gst plugin, that is a shared library (libgstkvssink.so) and could be used by gst-launch-1.0 command, but the producer, and other open-source located deps should be statically linked to that libgstkvssink.so. With current setup I can't find it in the options.
Current implementation makes kvssink GST component difficult to package/deploy.

To Reproduce
Steps to reproduce the behavior:

For now I can see two options to build kvssink, both unsatisfactory.

cmake .. -DBUILD_GSTREAMER_PLUGIN=ON -DBUILD_STATIC=ON -DBUILD_DEPENDENCIES=OFF
...
make
...
ls *libgst*   # here, we can see static lib that is useless for gst-launch-1.0 command
libgstkvssink.a

cmake .. -DBUILD_GSTREAMER_PLUGIN=ON -DBUILD_STATIC=OFF -DBUILD_DEPENDENCIES=OFF
...
make
...
ldd libgstkvssink.so | grep $(realpath ..)    # here, we can see shared lib, but linkage to dependencies is hardcoded. It makes kvssink difficult to package/deploy.
        libKinesisVideoProducer.so => /home/laptop/pro/amazon-kinesis-video-streams-producer-sdk-cpp/build_dynamic_default/libKinesisVideoProducer.so (0x00007dc51e172000)
        libcproducer.so => /home/laptop/pro/amazon-kinesis-video-streams-producer-sdk-cpp/build_dynamic_default/dependency/libkvscproducer/kvscproducer-src/libcproducer.so (0x00007dc51e0e8000)

Expected behavior
In libgstkvssink.so I don't want dependencies to libKinesisVideoProducer.so or libcproducer.so.

cmake .. -DBUILD_GSTREAMER_PLUGIN=ON -DBUILD_STATIC=ON
...
make
...
ls *libgst*
libgstkvssink.so

then issuing command:

ldd libgstkvssink.so | grep $(realpath ..)

should output nothing.

SDK version number
3.4.1

Open source building
default setup of dependencies (both system-installed libs, and libs built by cmake configure)

Screenshots
none

Platform (please complete the following information):

• OS: Linux, but maybe others
• Processor: any
• Version Ubuntu 22.04

Additional context
none