minimal Vault with few storage options and plugins

[thyton]

This PR implements go build tag minimal build minimal Vault to control built-in plugin registry and storage options

• Storage options available in minimal Vault
  • inmem_ha
  • inmem_transactional_ha
  • inmem_transactional
  • inmem
  • raft
• Built-in plugins available in minimal Vault
  • auth
    • approle
    • cert
    • jwt
    • oidc
    • userpass
  • secret
    • kv
    • pki
    • ssh
    • transit
    • database

# build minimal Vault without UI
$ MINIMAL=1 make dev

# build minimal Vault with UI
$ MINIMAL=1 make static-dist make dev-ui 

[github-actions]

CI Results:
All required Go tests succeeded but failures were detected ⚠️
Failures:

Test Type	Package	Test	Logs
race	command	TestAuditDisableCommand_Run	view test results
race	command	TestAuditEnableCommand_Run	view test results
race	command	TestAuditListCommand_Run	view test results
race	command	TestAuthCommand_Run	view test results
race	command	TestAuthDisableCommand_Run	view test results
race	command	TestAuthDisableCommand_Run/integration	view test results
race	command	TestAuthDisableCommand_Run/validations	view test results
race	command	TestAuthEnableCommand_Run	view test results
race	command	TestAuthHelpCommand_Run	view test results
race	command	TestAuthListCommand_Run	view test results

and 111 - 10 other tests

[github-actions]

Build Results:
All builds succeeded! ✅

[fairclothjm]

LGTM!

[benashz]

Looking good! Are there any tests that we can add to ensure that the vault-min was built properly? Maybe the same for vault-"mega", but might not be an issue.