Use list side input on cross product

[regadas]

this is related to #1152. A lot as changed since then:

• we can now detect the serialization of null values
• and beam is now 2.10.

Given this and the fact we are still not able to replicate I think we should restore the usage of ListSideInput.

[codecov]

Codecov Report

Merging #1691 into master will decrease coverage by 0.86%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1691      +/-   ##
==========================================
- Coverage   69.75%   68.89%   -0.87%     
==========================================
  Files         175      175              
  Lines        5330     5330              
  Branches      300      300              
==========================================
- Hits         3718     3672      -46     
- Misses       1612     1658      +46

Impacted Files	Coverage Δ
...in/scala/com/spotify/scio/values/SCollection.scala	91.3% <100%> (ø)	⬆️
...scala/com/spotify/scio/bigquery/client/Cache.scala	0% <0%> (-55.56%)	⬇️
.../spotify/scio/bigquery/client/BigQueryConfig.scala	0% <0%> (-50%)	⬇️
.../spotify/scio/bigquery/BigQueryPartitionUtil.scala	0% <0%> (-46.16%)	⬇️
...spotify/scio/coders/instances/AlgebirdCoders.scala	75% <0%> (-25%)	⬇️
...com/spotify/scio/bigquery/types/BigQueryType.scala	37.5% <0%> (-25%)	⬇️
...n/scala/com/spotify/scio/bigquery/BigQueryIO.scala	24.29% <0%> (-3.74%)	⬇️
...la/com/spotify/scio/bigquery/client/BigQuery.scala	27.02% <0%> (-2.71%)	⬇️
...com/spotify/scio/bigquery/types/TypeProvider.scala	76.59% <0%> (-2.13%)	⬇️
...la/com/spotify/scio/bigquery/client/QueryOps.scala	0.79% <0%> (-0.8%)	⬇️

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