Check whether the platform catalog couldn't be resolved from a Maven mirror

[aloubyansky]

If an extension catalog which is normally expected to be provided by Maven Central could not be resolved from a mirror,indicate that the mirror might not be up-to-date at the moment in the error message.

Example errors:

1. Maven plugin

[aloubyansky@localhost test]$ mvn io.quarkus:quarkus-maven-plugin:999-SNAPSHOT:create
[INFO] Scanning for projects...
[INFO] 
[INFO] ------------------< org.apache.maven:standalone-pom >-------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] --------------------------------[ pom ]---------------------------------
[INFO] 
[INFO] --- quarkus-maven-plugin:999-SNAPSHOT:create (default-cli) @ standalone-pom ---
[WARNING] The POM for io.smallrye.config:smallrye-config:jar:2.4.4 is missing, no dependency information available
[WARNING] Failed to resolve the Quarkus extension registry descriptor of registry.quarkus.io from aliyunmaven (https://maven.aliyun.com/repository/public) having applied the mirrors and/or proxies from the Maven settings to registry.quarkus.io (https://registry.quarkus.io/maven). Re-trying with the original registry.quarkus.io repository configuration.
[INFO] Looking for the newly published extensions in registry.quarkus.io
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  12.641 s
[INFO] Finished at: 2021-08-26T17:21:05+02:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal io.quarkus:quarkus-maven-plugin:999-SNAPSHOT:create (default-cli) on project standalone-pom: Failed to resolve the extensions catalog: Failed to resolve Quarkus extension catalog io.quarkus.platform:quarkus-optaplanner-bom-quarkus-platform-descriptor:json:2.1.4.Final:2.1.4.Final from aliyunmaven (https://maven.aliyun.com/repository/public) which is a mirror of central (https://repo.maven.apache.org/maven2) and is possibly not yet fully synched right now: Failed to resolve artifact io.quarkus.platform:quarkus-optaplanner-bom-quarkus-platform-descriptor:json:2.1.4.Final:2.1.4.Final: Could not find artifact io.quarkus.platform:quarkus-optaplanner-bom-quarkus-platform-descriptor:json:2.1.4.Final:2.1.4.Final in aliyunmaven (https://maven.aliyun.com/repository/public) -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

2. CLI

[aloubyansky@localhost test]$ qs create
Creating an app (default project type, see --help).
Looking for the newly published extensions in registry.quarkus.io
[ERROR] ❗  Unable to create project: Failed to resolve Quarkus extension catalog io.quarkus.platform:quarkus-kogito-bom-quarkus-platform-descriptor:json:2.1.4.Final:2.1.4.Final from aliyunmaven (https://maven.aliyun.com/repository/public) which is a mirror of central (https://repo.maven.apache.org/maven2) and is possibly not yet fully synched right now

[gastaldi]

LGTM