WIP: BIER extension for OSPFv3

[nrybowski]

This PR adds BIER extensions for OSPFv3 as defined by draft-ietf-bier-ospfv3-extensions-07. The TLV format is the same as for OSPFv2 hence implementing RFC8444 on the basis laid down by this PR should be straightforward.

It relies on #10 for the addition of the BIER YANG model.

TODO

• [x] Add non-mpls encapsulation sub-sub-TLV as defined by draft-ietf-bier-lsr-non-mpls-extensions-03
• [x] Encode BIER encapsulation sub-sub-TLV
• [ ] Handle BierCfgUpdate and BierCfgEncapUpdate events
• [ ] Enforce constraints on incoming BIER TLVs
• [ ] Implement BIER control-plane (BIFT computation, ...)
• [ ] Add unit test for BIER TLVs

[nrybowski]

Rebase on 980694896ed393dc66ea4b8b53bd9dcdaa247f1d

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 40.70796% with 134 lines in your changes missing coverage. Please review.

Project coverage is 63.07%. Comparing base (c370052) to head (81a0ab1). Report is 14 commits behind head on master.

Files with missing lines	Patch %	Lines
holo-ospf/src/ospfv3/lsdb.rs	4.87%	39 Missing :warning:
holo-ospf/src/northbound/configuration.rs	16.66%	35 Missing :warning:
holo-ospf/src/bier.rs	0.00%	21 Missing :warning:
holo-ospf/src/southbound/tx.rs	12.50%	14 Missing :warning:
holo-ospf/src/events.rs	0.00%	8 Missing :warning:
holo-ospf/src/packet/tlv.rs	89.33%	8 Missing :warning:
holo-ospf/src/instance.rs	0.00%	6 Missing :warning:
holo-ospf/src/route.rs	60.00%	2 Missing :warning:
holo-ospf/src/lsdb.rs	0.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #16      +/-   ##
==========================================
- Coverage   63.40%   63.07%   -0.34%     
==========================================
  Files         178      179       +1     
  Lines       29704    30018     +314     
==========================================
+ Hits        18833    18933     +100     
- Misses      10871    11085     +214     

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[nrybowski]

I'm not sure to understand why the BGP test suite is failing (https://github.com/holo-routing/holo/actions/runs/10468201712/job/28988566615?pr=16), I can't reproduce locally ..

[nrybowski]

The PR is still missing some integration tests and sanity check upon BIER TLV reception but it should be ready for a first review.

[nrybowski]

Rebase on c3700523d4360a59e520cbb1f194f9a5eaea14af to fix CI failure on BGP tests.