Change temp file name for server application

[felrock]

Avoid issue of removing file if it exists in the current working directory.

[felrock]

Sorry for adding these changes one by one!! Not very good practice of me, will try to gather them next time.

[bobqianic]

I believe we can just tweak the read_wav() function in common.cpp to enable it to directly read WAV files from RAM, bypassing the need to write them to disk.

whisper.cpp/examples/dr_wav.h

Lines 875 to 878 in 146169e

	The buffer should contain the contents of the entire wave file, not just the sample data.
	*/
	DRWAV_API drwav_bool32 drwav_init_memory(drwav* pWav, const void* data, size_t dataSize, const drwav_allocation_callbacks* pAllocationCallbacks);
	DRWAV_API drwav_bool32 drwav_init_memory_ex(drwav* pWav, const void* data, size_t dataSize, drwav_chunk_proc onChunk, void* pChunkUserData, drwav_uint32 flags, const drwav_allocation_callbacks* pAllocationCallbacks);

[felrock]

Yes, I tried it for a while with no success dr_wav is not a very versatile lib imo. For the server to scale that is a really nice improvement, but for just running it locally the time to read/save file is marginal to the actual time of the inference.