feat: add charts for a self-hosted signet setup

[openoms]

Discussed in: #1123

Depends on: GaloyMoney/blink#1385 (merged)

[openoms]

The exporter pod is failing:

exporter-5dbcc87b85-852bp                      0/1     CrashLoopBackOff   17 (106s ago)   70m
k3d@debian:~$ k -n galoy-dev-galoy logs exporter-5dbcc87b85-852bp
Defaulted container "exporter" out of: exporter, wait-for-mongodb-migrate (init)
/app/node_modules/bitcoin-core/dist/src/index.js:71
      throw new Error(`Invalid network name "${network}"`, {
      ^

Error: Invalid network name "signet"
    at new Client (/app/node_modules/bitcoin-core/dist/src/index.js:71:13)
    at new BitcoindClient (/app/lib/services/bitcoind/index.js:20:23)
    at Object.<anonymous> (/app/lib/services/bitcoind/index.js:87:33)
    at Module._compile (node:internal/modules/cjs/loader:1105:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1159:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Module.require (node:internal/modules/cjs/loader:1005:19)
    at Module.Hook._require.Module.require (/app/node_modules/require-in-the-middle/index.js:80:39)
    at Module.Hook._require.Module.require (/app/node_modules/require-in-the-middle/index.js:80:39)
    at Module.Hook._require.Module.require (/app/node_modules/require-in-the-middle/index.js:80:39)
    at Module.Hook._require.Module.require (/app/node_modules/require-in-the-middle/index.js:80:39)
    at Module.Hook._require.Module.require (/app/node_modules/require-in-the-middle/index.js:80:39)
    at Module.Hook._require.Module.require (/app/node_modules/require-in-the-middle/index.js:80:39)
    at Module.Hook._require.Module.require (/app/node_modules/require-in-the-middle/index.js:80:39)
    at require (node:internal/modules/cjs/helpers:102:18)

[openoms]

Both the regtest and signet setup is functional locally and the Makefile is extended with new entries.

To test the signet deployment:

cd charts/dev
git checkout dev-signet
make all-signet

LND on signet generates the seed successfully, but seems to need one restart to have the networking active and switch the state from:
RPC_ACTIVE to SERVER_ACTIVE

Commands to test:

k -n galoy-sig-bitcoin  logs    lnd1-0 -c lnd -f
kubectl -n galoy-sig-bitcoin exec -it lnd1-0 -c lnd -- lncli -n signet state 
kubectl -n galoy-sig-bitcoin delete pod lnd1-0 --force

Edit: lnd does become active but needs a significantly longer time ~20 mins. Increasing the timeout for signet so it has time to sync fully.

[krtk6160]

Just have a comment regarding the docs, otherwise LGTM