STATIC: <something>--static extends <something> and overrides some parameters to link statically.
Rationale: The default behavior in slapos seems to be dynamic linking, so currently the special case is the static one and it can be reached simply by overriding parameters.

DEP: dep--<something> extends <something> and overrides some parameters to use the host version of the dependencies.
Rationale:
- This is only for development and in particular packaging with OBS. The goal is mainly to be able to bypass the compilation of at least *some* building tools and therefore increase speed up the debugging process dramatically.
- Currently the same buildout files are used in this case, so it is only needed to override some parameters, and therefore it is only needed to extend the already existing <something>.

Note: "dep_" was initially choosen instead of "dep--", but it seems that "_" is forbidden in Debian package name (because "_" is the separator between the package name and its version).

software/light-build-dependencies-fluent-bit/: Support building without compiling the build dependencies for fluent-bit

component/mca/buildout.cfg: Update mca release.

software/mca/software.cfg: Transfer the implementation to component/mca/

- Change set GOPATH to buildout's directory so that Go packages are sent to OBS.
- Switch back the default behavior to running Go tests and skip them in section golang1.17

- Re-enable $PYTHON_PATH variable in mca's Makefile
- Change the mca release.

- gitclone does not support download-cache, so it fails in OBS' servers.

Deactivate fluent-bit part as there is already a package with fluent-bit.
- A merge between the two packages can be made later on.

Explanations: The network tests are failing on OBS' VM for package building. This is a first fix which can be improved later.

- Add metadata-collect-agent and its dependencies.
- Add fluent-bit output plugin for Wendelin (fluentbit_wendelin.so) and its dependencies.

Instead of lying in tests and checking for NotReadyYet in the connection
parameteres use promise to assert that generation of KeDiFa URLs is really
ready.

Drop hacks applied in the test, so that it will uncover all missing promises
and corner cases.

bootstrap-script-url and data-to-vm are important features of
enable-http-server and are expected to work correctly, thus cover them
with instance-level testing.

In mean time fix detected issues.

See merge request nexedi/slapos!1222

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