refactor: ATL-7040 remove old did based authentication

[EzequielPostan]

Overview

This PR should be merged after merging #841 . The base branch is the branch of that PR
I suggest not to review until that PR is merged

Screenshots

Checklists

Pre-submit checklist:

• Self-reviewed the diff
• New code has proper comments/documentation/tests
• Any changes not covered by tests have been tested manually
• The README files are updated
• If new libraries are included, they have licenses compatible with our project
• If there is a db migration altering existing tables, there is a proper migration test

Pre-merge checklist:

• Commits have useful messages
• Review clarifications made it into the code

[github-actions]

Unit Test Results

276 tests   275 ✔️  24s ⏱️
  35 suites      1 💤
  35 files        0 ❌

Results for commit 21785f2.

[atala-dev]

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors
✅ ACTION	actionlint	1		0
⚠️ MARKDOWN	markdownlint	5		90
⚠️ MARKDOWN	markdown-link-check	5		10
✅ MARKDOWN	markdown-table-formatter	5		0
⚠️ PROTOBUF	protolint	4		4
✅ REPOSITORY	dustilock	yes		no
✅ REPOSITORY	git_diff	yes		no
✅ REPOSITORY	grype	yes		no
⚠️ REPOSITORY	kics	yes		49
✅ REPOSITORY	syft	yes		no
✅ REPOSITORY	trivy-sbom	yes		no
⚠️ REPOSITORY	trufflehog	yes		1
✅ SQL	sql-lint	2		0
⚠️ YAML	prettier	2		1
✅ YAML	v8r	2		0
✅ YAML	yamllint	2		0

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[EzequielPostan]

replaced with #843 after a rebase/squash