Publish Redshift benchmark results

[pankajkoti]

Publish Redshift benchmark results for native and default approach.

The existing dataset failed with schema mismatch error while inserting rows.
The pandas auto-detection created schema with columns as varchar(256) limiting
the values to be 256 bytes long. However, some row contained a value larger than 256
bytes and then it complained with value too long error.
Hence, we have created new fake data set and kept in S3 with data
of required various sizes for benchmarking purposes and have also updated
the datasets.md to provide details of this new files.

blocked by: #805
closes: #748

[codecov]

Codecov Report

Base: 93.25% // Head: 93.30% // Increases project coverage by +0.04% 🎉

Coverage data is based on head (52ff732) compared to base (8b79c39).
Patch has no changes to coverable lines.

❗ Current head 52ff732 differs from pull request most recent head 9b6c74f. Consider uploading reports for the commit 9b6c74f to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #806      +/-   ##
==========================================
+ Coverage   93.25%   93.30%   +0.04%     
==========================================
  Files          47       44       -3     
  Lines        2046     1911     -135     
  Branches      256      237      -19     
==========================================
- Hits         1908     1783     -125     
+ Misses        107      100       -7     
+ Partials       31       28       -3     

Impacted Files	Coverage Δ
python-sdk/src/astro/airflow/datasets.py	83.33% <0.00%> (-11.12%)	⬇️
python-sdk/src/astro/sql/operators/raw_sql.py	86.36% <0.00%> (-3.30%)	⬇️
python-sdk/src/astro/sql/operators/export_file.py	93.93% <0.00%> (-0.80%)	⬇️
python-sdk/src/astro/databases/snowflake.py	95.95% <0.00%> (-0.66%)	⬇️
python-sdk/src/astro/sql/operators/transform.py	88.00% <0.00%> (-0.47%)	⬇️
python-sdk/src/astro/sql/operators/dataframe.py	93.05% <0.00%> (-0.37%)	⬇️
...thon-sdk/src/astro/sql/operators/base_decorator.py	94.05% <0.00%> (-0.29%)	⬇️
python-sdk/src/astro/databases/base.py	96.10% <0.00%> (-0.26%)	⬇️
python-sdk/src/astro/databases/aws/redshift.py	93.04% <0.00%> (-0.18%)	⬇️
python-sdk/src/astro/sql/operators/load_file.py	97.14% <0.00%> (-0.08%)	⬇️
... and 26 more

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[dimberman]

@pankajkoti why did we have to use a fake dataset for redshift? Can you please add this to the description?

[pankajkoti]

@pankajkoti why did we have to use a fake dataset for redshift? Can you please add this to the description?

@dimberman Updated the description. Please check

[utkarsharma2]

@pankajkoti Let's not merge this PR until we resolve and merge - #805