Python preprocessing image

[groutr]

Convert python-preprocessing lambda function from layer based to image based.

[groutr]

A small benchmark for max_values.

# Initial max_values
Duration
359703.73 ms
Billed duration
368240 ms
Resources configured
1024 MB
Max memory used
821 MB

# Using xarray+fsspec and h5netcdf to read remote files directly
# More memory efficient max value computation
Duration
156503.26 ms
Billed duration
156504 ms
Resources configured
6000 MB
Max memory used
763 MB

[groutr]

A small benchmark for anomoly

Duration
157696.26 ms
Billed duration
157697 ms
Resources configured
10240 MB
Max memory used
7439 MB

Duration
149726.80 ms
Billed duration
155115 ms
Resources configured
10240 MB
Max memory used
2877 MB

Significant reduction in memory usage.

Didn't realize the PR is a draft

[groutr]

This PR is becoming to large to effectively review. Therefore, I'm splitting into smaller PRs.