Add `require_confirmed_inputs` to RBF messages

[t-bast]

This was missing from the spec, but is more flexible and clearer than inheriting values from the previous attempt. The dual funding specification added this in https://github.com/lightning/bolts/pull/851/commits/27ffef47aee985d37dcef85d528719f9a4608400

Fixes #2782

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (61f1e1f) 85.85% compared to head (5aa515d) 85.89%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2783 +/- ## ========================================== + Coverage 85.85% 85.89% +0.04% ========================================== Files 216 216 Lines 18188 18201 +13 Branches 780 776 -4 ========================================== + Hits 15615 15634 +19 + Misses 2573 2567 -6 ``` | [Files](https://app.codecov.io/gh/ACINQ/eclair/pull/2783?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ACINQ) | Coverage Δ | | |---|---|---| | [...inq/eclair/channel/fsm/ChannelOpenDualFunded.scala](https://app.codecov.io/gh/ACINQ/eclair/pull/2783?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ACINQ#diff-ZWNsYWlyLWNvcmUvc3JjL21haW4vc2NhbGEvZnIvYWNpbnEvZWNsYWlyL2NoYW5uZWwvZnNtL0NoYW5uZWxPcGVuRHVhbEZ1bmRlZC5zY2FsYQ==) | `87.03% <100.00%> (+0.55%)` | :arrow_up: | | [...ala/fr/acinq/eclair/wire/protocol/ChannelTlv.scala](https://app.codecov.io/gh/ACINQ/eclair/pull/2783?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ACINQ#diff-ZWNsYWlyLWNvcmUvc3JjL21haW4vc2NhbGEvZnIvYWNpbnEvZWNsYWlyL3dpcmUvcHJvdG9jb2wvQ2hhbm5lbFRsdi5zY2FsYQ==) | `100.00% <100.00%> (ø)` | | | [.../acinq/eclair/wire/protocol/InteractiveTxTlv.scala](https://app.codecov.io/gh/ACINQ/eclair/pull/2783?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ACINQ#diff-ZWNsYWlyLWNvcmUvc3JjL21haW4vc2NhbGEvZnIvYWNpbnEvZWNsYWlyL3dpcmUvcHJvdG9jb2wvSW50ZXJhY3RpdmVUeFRsdi5zY2FsYQ==) | `100.00% <ø> (ø)` | | | [...q/eclair/wire/protocol/LightningMessageTypes.scala](https://app.codecov.io/gh/ACINQ/eclair/pull/2783?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ACINQ#diff-ZWNsYWlyLWNvcmUvc3JjL21haW4vc2NhbGEvZnIvYWNpbnEvZWNsYWlyL3dpcmUvcHJvdG9jb2wvTGlnaHRuaW5nTWVzc2FnZVR5cGVzLnNjYWxh) | `98.82% <100.00%> (+0.12%)` | :arrow_up: | ... and [2 files with indirect coverage changes](https://app.codecov.io/gh/ACINQ/eclair/pull/2783/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=ACINQ)