Fix image ID parsing in modern Docker

[sritchie]

This PR:

• Upgrades psycopg2-binary and pytest to get tests passing again with modern Python.

• Modifies docker build commands to get the built image ID via --iidfile vs parsing the shell command output.

• adds --platform linux/amd64 to docker run and docker build commands, until we get support for arm64 sorted out.

• fixes failure when GCP credentials aren't configured running in local mode.

[codecov[bot]]

Codecov Report

Merging #109 (cadd75b) into master (56f96e7) will decrease coverage by 2.87%. The diff coverage is 35.41%.

@@            Coverage Diff             @@
##           master     #109      +/-   ##
==========================================
- Coverage   55.72%   52.85%   -2.87%     
==========================================
  Files          31       33       +2     
  Lines        3180     3557     +377     
==========================================
+ Hits         1772     1880     +108     
- Misses       1408     1677     +269     

Impacted Files	Coverage Δ
caliban/platform/run.py	28.44% <0.00%> (ø)
caliban/util/fs.py	90.56% <ø> (ø)
caliban/docker/build.py	32.56% <33.33%> (-0.15%)	:arrow_down:
caliban/resources/caliban_launcher.py	96.72% <60.00%> (-3.28%)	:arrow_down:

... and 8 files with indirect coverage changes