Switch to dfinity/setup-dfx action (#2346)

This PR removes our local `setup-dfx` action and replaces it with the one
maintained by the SDK team. This action has the advantage that it integrates
with the new `dfxvm` and reads the desired dfx version from `dfx.json`.

Adding the version there also aligns the dfx version used locally with the
one on CI. The dfx version will be bumped to `0.18.0` in a follow-up
commit.

Side-note on CI runtime: the `dfinity/setup-dfx` does not use caching
(unlike our version) but still takes only about 4s to complete.
Given that we get rid of some complexity that way, I think the 3s are
worth it.

Also, because the `dfinity/setup-dfx` action is not yet properly published
on the market place (there is an open issue for that [here](dfinity/setup-dfx#8))
a specific commit is pinned instead.

.github/workflows/canister-tests.yml

@@ -432,7 +432,7 @@ jobs:
       - name: Kickstart npm ci
         run: '{ npm ci --no-audit --no-fund; echo "$?" > ~/npm-ci-status; } &'
 
-      - uses: ./.github/actions/setup-dfx
+      - uses: dfinity/setup-dfx@0c1c03fb1a56008724b5d05ddfec0eef9479bdf8
 
       # Helps with debugging
       - name: Show versions
@@ -545,7 +545,7 @@ jobs:
           google-chrome --version
 
       - uses: ./.github/actions/setup-node
-      - uses: ./.github/actions/setup-dfx
+      - uses: dfinity/setup-dfx@0c1c03fb1a56008724b5d05ddfec0eef9479bdf8
 
       # Helps with debugging
       - name: Show versions
@@ -600,7 +600,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: ./.github/actions/setup-dfx
+      - uses: dfinity/setup-dfx@0c1c03fb1a56008724b5d05ddfec0eef9479bdf8
 
       - name: 'Download II wasm'
         uses: actions/download-artifact@v4

.github/workflows/deploy-rc.yml

@@ -58,7 +58,7 @@ jobs:
       - name: "Print shasum of found build"
         run: shasum -a 256 ./internet_identity_production.wasm.gz
 
-      - uses: ./.github/actions/setup-dfx
+      - uses: dfinity/setup-dfx@0c1c03fb1a56008724b5d05ddfec0eef9479bdf8
 
       - name: 'Install key'
         env:

dfx.json

@@ -27,5 +27,6 @@
       "packtool": ""
     }
   },
+  "dfx": "0.15.3",
   "version": 1
 }