Add bitcoin core v31.0

[djkazic]

Adds bitcoin core v31.0.

Manually built and tested locally for both the alpine and prebuilt variants.

Also includes some janitorial fixes:

• Removes v26 from the build jobs
• Bumps v30 to v30.2, as the former was removed from the bitcoincore.org build server

[guggero]

Nice! The alpine build currently doesn't work, but have a suggestion for a fix.

[lightninglabs-deploy]

@guggero: review reminder

[guggero]

Hmm, not sure if this is a CDN issue or the DNS somehow resolves differently for you, but I still get:

0.117 fetch https://dl-cdn.alpinelinux.org/alpine/v3.19/main/x86_64/APKINDEX.tar.gz
0.349 fetch https://dl-cdn.alpinelinux.org/alpine/v3.19/community/x86_64/APKINDEX.tar.gz
0.667 ERROR: unable to select packages:
0.667   gosu (no such package):
0.667     required by: world[gosu]

With docker build -t guggero/bitcoin-core:31 --build-arg RC=rc1 --build-arg RC_DIR=test.rc1/ --build-arg TARGETPLATFORM=linux/amd64 -f 31/alpine/Dockerfile 31

[djkazic]

Ah! I think that could explain it. I was building for arm, let me try the cross-platform build now.

[djkazic]

Hmm, nope. It still built with your exact command on my machine:

#12 [stage-1 5/9] RUN apk --no-cache add   boost-filesystem   boost-system   boost-thread   gosu   libevent   libzmq   shadow   sqlite-dev   su-exec
#12 0.426 ( 1/23) Installing libgcc (15.2.0-r2)
#12 0.445 ( 2/23) Installing libstdc++ (15.2.0-r2)
#12 0.474 ( 3/23) Installing boost1.84-filesystem (1.84.0-r3)
#12 0.561 ( 4/23) Installing boost1.84-system (1.84.0-r3)
#12 0.667 ( 5/23) Installing boost1.84-thread (1.84.0-r3)
#12 0.683 ( 6/23) Installing gosu (1.17-r18)

Perhaps you have to invalidate some builder cache?

[guggero]

Hmm, doesn't seem to be cache... But must be something on my end, so not blocking the PR on it. LGTM 🎉

[djkazic]

Reusing this for Bitcoin Core v31 release.