refactor: convert pg commands to esm part 13

[erika-wallace]

Description

W-19701133

This PR converts the following pg commands and their associated tests to ESM.

Converted commands:

• upgrade/cancel.ts
• upgrade/dryrun.ts
• upgrade/index.ts
• upgrade/prepare.ts
• upgrade/run.ts
• upgrade/wait.ts

Notable Changes:

• Replaced the use of strip-ansi with ansis to strip ANSI code from test output based on this conversation

Testing

Notes:
Requires a Standard-tier or higher Postgres database.

Steps:
Pull down branch, npm install && npm run build

# Show converted commands
./bin/run pg:upgrade --help

# Upgrades Essential-tier databases or followers (should error for Standard-tier or higher)
./bin/run pg:upgrade DATABASE --app APP

# Run a test upgrade simulation (sends an email when complete - takes a while)
./bin/run pg:upgrade:dryrun DATABASE --app APP

# Schedule an upgrade
./bin/run pg:upgrade:prepare DATABASE --app APP

# Check status (will show preparation progress, Ctrl+C to exit)
./bin/run pg:upgrade:wait DATABASE --app APP

# Cancel the scheduled upgrade
./bin/run pg:upgrade:cancel DATABASE --app APP

[tlowrimore-heroku]

Looks good!