ci: add latest-dev docker tag

[strophy]

Issue being fixed or feature implemented

In order to run test suite against both testnet and devnets in CI from a single repo, it is necessary to use a matrix strategy to select a test suite image version to match the version running on the networks. To avoid hard coding the version for devnets, we need to add latest-dev to the list of Docker tags generated by the metadata action.

What was done?

• Bump metadata action version
• Always emit latest tag and apply suffix

How Has This Been Tested?

Tested in Github Actions from strophy/platform repo. Example outputs:
Input: v0.23.0-dev.6

  dashpay/platform-test-suite:0-dev
  dashpay/platform-test-suite:0.23-dev
  dashpay/platform-test-suite:0.23.0-dev
  dashpay/platform-test-suite:0.23.0-dev.6
  dashpay/platform-test-suite:latest-dev

Input: v0.23.1

  dashpay/platform-test-suite:0
  dashpay/platform-test-suite:0.23
  dashpay/platform-test-suite:0.23.1
  dashpay/platform-test-suite:latest

Breaking Changes

None

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone

[jaboski]

I reran platform test suite which passed in second execution

[jaboski]

Ok for me