Support Snowflake (#5500)

[turb]

First draft of SnowflakeIO for scio, using the one from Beam.

It has:

• SnowflakeSelect (read only), allowing to read from a select
• SnowflakeTable (rw), allowing to read or write from/to a table
• ScioContext and SCollection implicits

Notes:

• I wanted to add some unit tests, but was unsure what could be done, since the only docker env I could find is LocalStack which requires signup
• I did test real-world scenarios for reads, but I ran into [Bug]: Fail to retrieve rowcount for first arrow chunk: null. apache/beam#24374 on write

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 49 lines in your changes missing coverage. Please review.

Project coverage is 61.13%. Comparing base (b2c4ff1) to head (9f6010d).

Files with missing lines	Patch %	Lines
...scala/com/spotify/scio/snowflake/SnowflakeIO.scala	0.00%	37 Missing ⚠️
...tify/scio/snowflake/syntax/SCollectionSyntax.scala	0.00%	10 Missing ⚠️
...tify/scio/snowflake/syntax/ScioContextSyntax.scala	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5502      +/-   ##
==========================================
- Coverage   61.42%   61.13%   -0.29%     
==========================================
  Files         312      315       +3     
  Lines       11106    11155      +49     
  Branches      771      764       -7     
==========================================
- Hits         6822     6820       -2     
- Misses       4284     4335      +51     

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[turb]

The build wants me to have "com.nrinaudo" %% "kantan.csv" % kantanCsvVersion as a runtime dep, but then it cannot compile. I thought that a compile dep was also supposed to be in runtime (at least in the Maven model).