This is just a cleanup of exception usage (by making them checked, fixing compiler issues, and undoing the change). There are at least two bugs (runtime escapes) fixed in this PR.
The decryption should happen transparently, also, resolver should not decrypt for itself only, whole maven should have access to all.
This PR also disables Maven 3.0 IT MNG-4459 as Maven4 stops with this "security through obscurity" (keep encrypted pw in memory kinda for "security reasons" but in reality any mojo or extension can decrypt anything they want).
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https://issues.apache.org/jira/browse/MNG-8379
First part was to "reverse" MavenCli into CLIng, that also became a huge and complex beast. Now, sanitization comes, tearing down unneeded stuff. CLIng should be simple and straightforward.
Now the **invoker** fully parses args, creates Maven instance (ie. local, using Maven components on classpath) and invokes Maven. The new **executor** in turn does NOT fully parses args and is logical equivalent of maven-invoker.
Changes:
* radically simplify CLIng existing classes (and especially API - the fact we have "local", "resident" etc invoker is actually implementation detail).
* introduce "executor", a "lower level" tool that does not parse args (and is logical equivalent of maven-invoker) and support Maven 4.x and Maven 3.x.
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https://issues.apache.org/jira/browse/MNG-8375
Detach maven-cli from maven-embedder (deprecated). Basically, classes are copied from embedder to cli, while embedder points to old classes and cli to new classes. **One important exception is logging**: the classes are _moved_ to cli, and embedder modified to use those classes (and dependency reversed: embedder now depends on cli). Reason is Verifier, that still calls into "hack method" of deprecated MavenCli, and then without logging classes move would explode due casting.
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https://issues.apache.org/jira/browse/MNG-8332
As counterpart to maven.repo.local.tail, but this one "prepends" while other "appends". This means one can do like this
```
$ mvn install -Prun-its -Dmaven.repo.local.head=~/.m2/repository-it
```
And have stuff installed into dedicated IT local repo (as IT bits must be installed), instead to pollute own local repo.
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https://issues.apache.org/jira/browse/MNG-8370
To have them listed in generated docs, as they were forgotten.
Also, adding a "compat" support for Maven 3.9.x property for chained reposes.
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https://issues.apache.org/jira/browse/MNG-8362
Tamas Cservenak
Guillaume Nodet