Deploy archives without publication in CI mode

[yahavi]

• All tests passed. If this feature is not already covered by the tests, I added new
  tests.

---

CI mode - deploy archives when no publishing extension is applied.
This PR is necessary to upgrade the Gradle plugin to 5+ in the JFrog CLI and in the Jenkins Artifactory plugin.

[github-actions]

JFrog Frogbot

[attiasas]

IvyArtifactPattern can be optional/blank. Should we check for that before?

[yahavi]

getIvyArtifactPattern returns a default non-blank value if the IvyArtifactPattern is blank:

public String getIvyArtifactPattern() {
    String value = getStringValue(IVY_ART_PATTERN);
    if (StringUtils.isBlank(value)) {
        return LayoutPatterns.M2_PATTERN;
    }
    return value.trim();
}

[attiasas]

looks good! consider the following:

1. adding tests that cover those cases.
2. is this option only available in CI mode? can't we extend it for normal use as well? maybe with a flag if needed
3. update README configuration part to include this as a note

[yahavi]

1. Added ciServerArchivesTest
2. This shouldn't work in a non-ci mode. We should encourage users to use only Gradle publications.
3. But there is zero configuration needed. The process is entirely transparent for the user. Also, users of this plugin will not execute the added code.