Drop --user root from CI containers

Run as the container's default user (uid 1001) which matches the
GitHub Actions runner user. Fixes permission-based tests that fail
when running as root since root bypasses file permission checks.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Martin Szuc <mszuc@redhat.com>

Author: martinszuc

.github/workflows/build-test.yml

@@ -18,7 +18,6 @@ jobs:
     runs-on: ubuntu-latest
     container:
       image: registry.access.redhat.com/ubi9/go-toolset:1.26
-      options: --user root
     steps:
       - name: Checkout source code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # pin@v6.0.2

.github/workflows/golangci-lint.yml

@@ -13,7 +13,6 @@ jobs:
     runs-on: ubuntu-latest
     container:
       image: registry.access.redhat.com/ubi9/go-toolset:1.26
-      options: --user root
     steps:
       - name: Checkout
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # pin@v6.0.2

.github/workflows/govulncheck.yml

@@ -19,7 +19,6 @@ jobs:
     runs-on: ubuntu-latest
     container:
       image: registry.access.redhat.com/ubi9/go-toolset:1.26
-      options: --user root
     steps:
       - name: Checkout
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # pin@v6.0.2

.github/workflows/release.yml

@@ -20,7 +20,6 @@ jobs:
     runs-on: ubuntu-latest-16-cores
     container:
       image: registry.access.redhat.com/ubi9/go-toolset:1.26
-      options: --user root
     steps:
       - name: Checkout source code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # pin@v6.0.2
@@ -81,7 +80,6 @@ jobs:
     if: github.ref == 'refs/heads/main' && github.repository == 'helm/helm'
     container:
       image: registry.access.redhat.com/ubi9/go-toolset:1.26
-      options: --user root
     steps:
       - name: Checkout source code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # pin@v6.0.2