ci(build): extract version from cargo-metadata

Avoids this issue

```
Error: Cannot downgrade from 24.7.0 to 0.0.0-pr602
```

.github/workflows/build.yml

@@ -345,7 +345,9 @@ jobs:
           bin: cargo-set-version
       - name: Update version if PR
         if: ${{ github.event_name == 'pull_request' }}
-        run: cargo set-version --offline --workspace 0.0.0-pr${{ github.event.pull_request.number }}
+        run: |
+          VERSION=$(cargo metadata --format-version=1 | jq -r '.workspace_members[] | match("operator@(.*)$").captures[0].string')
+          cargo set-version --offline --workspace "${VERSION}-pr${{ github.event.pull_request.number }}"
 
       # Recreate charts and publish charts and docker image. The "-e" is needed as we want to override the
       # default value in the makefile if called from this action, but not otherwise (i.e. when called locally).
@@ -410,7 +412,9 @@ jobs:
           bin: cargo-set-version
       - name: Update version if PR
         if: ${{ github.event_name == 'pull_request' }}
-        run: cargo set-version --offline --workspace 0.0.0-pr${{ github.event.pull_request.number }}
+        run: |
+          VERSION=$(cargo metadata --format-version=1 | jq -r '.workspace_members[] | match("operator@(.*)$").captures[0].string')
+          cargo set-version --offline --workspace "${VERSION}-pr${{ github.event.pull_request.number }}"
       - name: Build manifest list
         run: |
           # Creating manifest list

scripts/run-tests

@@ -31,9 +31,9 @@ Examples:
 
     ./scripts/run-tests --parallel 4
 
-2. Install operators but for Airflow use version "0.0.0-pr123" instead of "0.0.0-dev" and run all tests as above:
+2. Install operators but for Airflow use version "0.0.0-dev-pr123" instead of "0.0.0-dev" and run all tests as above:
 
-    ./scripts/run-tests --operator airflow=0.0.0-pr123 --parallel 4
+    ./scripts/run-tests --operator airflow=0.0.0-dev-pr123 --parallel 4
 
 3. Do not install any operators, run the smoke test suite and keep namespace: