mender: remove support for deprecated commands and flags

Remove support in the mender CLI interface to:

• Commands: "-install", "-commit", "-rollback", "-daemon", "-bootstrap", "-check-update", "-send-inventory", "-show-artifact"
• Flags: "-version", "-config", "-fallback-config", "-trusted-certs", "-forcebootstrap", "-skipverify", "-log-level", "-log-modules", "-no-syslog", "-log-file"

Acceptance criteria:

• A log message is printed when the deprecated commands/flags are used
• Deprecated commands/flags exit with error
• Acceptance tests are updated
  • NOTE: check if tests potentially need to support both syntax
• Integration tests are updated