refactor: umbrella issue for ANTA 2.0.0

[mtache]

Taking notes while building ANTA UML diagram (#1004) and 2.0.0 Public API documentation... To be discussed.

Pubic attributes and methods that should be private:

• AntaDevice.cache
• AntaDevice.cache_locks
• AntaTemplate.params_schema
• AntaCatalog.flatten_modules()
• AntaCatalog.check_tests() (that is a pydantic validator)
• AntaTest.nrfu_task, AntaTest.progress and AntaTest.update_progress()
• AntaTest.collect()

Rename public attributes and methods:

• TestResult.name -> TestResult.device
• AntaIntenvory.get_inventory() -> AntaInventory.filter()
• AntaIntenvory.connect_inventory() -> AntaInventory.connect()
• AntaIntenvory.add_device() -> AntaInventory.add()
• AntaCatalog.merge_catalogs() -> AntaCatalog.merge() (AntaCatalog.merge() is deprecated. Does this comply with SemVer ?)
• AntaInventoryInput -> AntaInventoryFile (to be consistent with AntaCatalogFile)

Move classes/modules:

• anta.reporter.ReportTable to its own module like CSV and Markdown
• anta.reporter.ReportJinja to its own module like CSV and Markdown

Remove unused classes:

• AntaParamsBaseModel. <<< this is used in AntaTemplate but maybe we could instead group this as a base AntaBaseModel with extra config set to False.
• AntaCatalogFile has a to_json() method (that is just the pydantic model_dump_json() method) and not the AntaInventoryInput model. <<< not sure it is in the right category of "unused class"

Make AntaCommand and AntaTemplate not pydantic class to avoid validation

Method signatures:

• AntaTest.test() returns Coroutine[Any, Any, TestResult] but should return None.
• Is the AntaTest.anta_test decorator really needed? We could just implement it as a run function that would be called by the framework and avoid the need for the user to decorate the AntaTest.test() function. The eos_data could be provided via another public method.

SemVer

• publish a proper SemVer documentation with the public API for ANTA (i.e. what's expecting not too break inside a common major release train)

Tests/Inputs

• Remove BgpAddressFamily, replaced by BgpPeer
• Rename BgpPeer.capabilites to BgpPeer.address_families
• Remove VerifyBGPSpecificPeers, replaced by VerifyBGPPeerSession with added AFI/SAFI checks
• Update VerifyBGPPeerCount and VerifyBGPPeersHealth with BgpPeer
• Remove input ClassVar and deprecated input models