Create source code archive manually

[var77]

Currently on release pipeline the Source Code archive Github is creating automatically does not include the submodules in it, so basically if someone will download the source code archive and try to build from it one will get an error.
With this PR, we will create an archive of source code with all submodules manually and upload it to release artifacts under the name lantern-v$version-source.tar.gz

[github-actions]

Benchmarks

metric	old	new	pct change
recall (after create)	0.740	0.740	-
recall (after insert)	0.784	0.784	-
select bulk tps	144.527	169.174	+17.05%
select bulk latency (ms)	54.570	46.587	-14.63%
select bulk latency (stddev ms)	7.417	8.681	+17.04%
create latency (ms)	1741.155	1449.394	-16.76%
insert bulk tps	8.137	9.864	+21.22%
insert bulk latency (ms)	122.867	101.360	-17.50%
insert bulk latency (stddev ms)	5.116	3.292	-35.65%
disk usage (bytes)	6348800.000	6348800.000	-