Implement lazy initialization for GCS backend

- Based on S3 version in TileDB-Inc#1084
- Update HISTORY.md

Hot-fix for unwanted zlib linkage

By removing GCS-detected variables and targets.

Check ENV for config values with config_iter

This fixes a problem where in python default values are printed instead
of the user set ENV config parameters. The iterator still only iterates
over set or defaulted config parameters. We don't iterate over all env
variables at this point, that is left to a future change if a user
requests it.

Compress and upload build directory in release CI

This uploads the build directories to azure artifacts for easier
debugging of link problems we have been having.

Compress and upload build directory in release CI

This uploads the build directories to azure artifacts for easier
debugging of link problems we have been having.

Disable GCS in artifact build

Update History file for 2.0.3

Update HISTORY.md for 2.0.2

Final history update for 2.0.1

Update HISTORY for Official 2.0.0 release