remove caching from reports image

complexity and unlikely use vs 2 minute build time seem like an unnecessary tradeoff

.docker/Dockerfile.gha-reports

@@ -17,7 +17,7 @@ RUN apt-get update \
 RUN touch ~/.bashrc
 ENV BASH_ENV=~/.bashrc
 
-curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/install.sh  | bash
+RUN curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/install.sh  | bash
 RUN nvm install 20 && \
     nvm use 20 && nvm alias default 20 && \
     npm install -g npm@10.9.0 && \

.github/workflows/build-reports-image.yml

@@ -121,17 +121,6 @@ jobs:
           install: true
           version: v0.17.1
 
-      # Cache layers specific to current sha, but allow rummaging through older caches if none for current
-# TODO determine if this would need to be fixed to actually cache seomthing (and what key should be, w/r/t not
-#  destructively colliding with normal build cache, and meaningful sha (presumably sha from inputs?) or whatnot.
-#      - name: Cache Docker layers
-#        uses: actions/cache@v4
-#        with:
-#          path: /tmp/.buildx-cache
-#          key: ${{ runner.os }}-buildx-${{ github.sha }}
-#          restore-keys: |
-#            ${{ runner.os }}-buildx
-
       - name: Login to GHCR
         uses: docker/login-action@v3
         with: