ZSTD and GZIP/DEFLATE streaming support

[ktsaou]

This PR adds:

• ZSTD compression support to streaming
• GZIP/DEFLATE compression support to streaming
• user configurable compression algorithms on parents
• compression level per algorithm on children
• add more error messages to detect disconnect issues
• unittest for all compression algorithms

[netdata-community-bot]

This pull request has been mentioned on Netdata Community Forums. There might be relevant details there:

https://community.netdata.cloud/t/update-frequency-of-cascaded-parents/4796/2

[vkalintiris]

@ktsaou check vkalintiris@15743be
From the logs of a child:

~/opt/child/netdata$ grep tainted var/log/netdata/error.log | grep GVD | grep '[01]$' | awk '{ print $NF }' | sort | uniq -c
157533 0
143786 1

Aka, 52% of the charts do not have changed dimensions between consecutive collection intervals. The buffer of the charts can be flushed and its contents can be replaced with a new command that will let the parent know that the chart's dimensions did not change state.

I believe we can reduce traffic ~50% and improve compression CPU consumption by an equal or even larger amount.

[stelfrag]

New parent (zstd-streaming) with old version child connected gets frequent disconnections due to

2023-10-26 23:15:12: netdata ERROR : RCVR[destiny] : RRDPUSH_DECOMPRESS: decompressed data is 16384 bytes, which is bigger than the max msg size 16255
2023-10-26 23:15:12: netdata INFO  : RCVR[destiny] : STREAM 'destiny' [receive from [192.168.1.138]:49754]: disconnected (completed 2 updates). STATUS: DISCONNECTED (DISCONNECTED UNKNOWN SOCKET READ ERROR)

[ktsaou]

New parent (zstd-streaming) with old version child connected gets frequent disconnections due to

Fixed.