build: dockerize the program build and test suite

[karl-dz]

Summary

• Build the program in Docker via make build, so no Solana toolchain, Anchor CLI, or avm is needed on the host
• Run the test suite via make test against a containerized solana-test-validator, replacing anchor test
• Set --ticks-per-slot 16 for 100ms slots, taking the suite from roughly fifteen minutes to a few minutes
• Replace the Tests workflow, which installed Anchor 0.29.0 and Solana 1.18.16 against a tree needing 0.32 and 2.2
• Stop the TypeScript build depending on solita codegen, which regenerates committed files and empties the IDL directory when it fails
• Replace the README build instructions, which pinned agave-install 1.18.16 and avm use 0.29.0

Testing

• make build from a clean checkout, and a second run fully served from cache
• make test: 163 passing, 12 pending, 0 failing, in 56s
• make build and make build-testing producing different binaries