in_calyptia_fleet: backport support for net.* properties for the upstream connection

[mattyaterz]

Copying #10998 (which went into master) into 4.0

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Enter [N/A] in the box, if an item is not applicable to your change.

Testing
Before we can approve your change; please submit the following in a comment:

• [N/A] Example configuration file for the change
• Debug log output from testing the change

Before

matty@ubuntu:~/dev/fluent-bit/build$ ./bin/flb-rt-custom_calyptia_input_test 
Test set_fleet_input_properties...                Test interrupted by SIGSEGV.
Test machine_id_generation...                     Test interrupted by SIGSEGV.
FAILED: 2 of 2 unit tests have failed.

After

matty@ubuntu:~/dev/fluent-bit/build$ ./bin/flb-rt-custom_calyptia_input_test 
Test set_fleet_input_properties...              [ OK ]
Test machine_id_generation...                   [ OK ]
SUCCESS: All unit tests have passed.

• [N/A] Attached Valgrind output that shows no leaks or memory corruption was found

If this is a change to packaging of containers or native binaries then please confirm it works for all targets.

• [N/A] Run local packaging test showing all targets (including any new ones) build.
• [N/A] Set ok-package-test label to test for all targets (requires maintainer to do).

Documentation

• [N/A] Documentation required for this feature

Backporting

• [N/A] Backport to latest stable release.

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Fluent Bit is licensed under Apache 2.0, by submitting this pull request I understand that this code will be released under the terms of that license.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[mattyaterz]

Closing as a duplicate of #11001